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@RANDOMFIX I need some help.. 2009 aveo p0301 and p0420 code I have replaced cam sensors crankshaft sensor fuel pump relay because it stopped starting and started once it was replaced... coils and plugs and an oem downstream 02 sensor to clear all other codes I have except these 2 the p0420 came on after using some.system cleaners realized last week my intake hose had a huge slit on the bottom and replaced it still have p0420 and p0301. I am losing power misfiring and horrible fuel efficiency. I have been looking at live data on my chesp obd reader it doesn't have graphs but does have the data I just don't know what they should be... Anyway, after intake hose replaced p0420 went away for a cpl days but it's back and still same issues. Prior to intake hose CATTEMP1 was reading 3 to 500F now it's reading 1000 to all the way up to 1475 today is that OK? and what would u think the issue is ? Fuel trims seem to be bouncing around a lot and reader also showing open loop fault and open loop driver even with engine hot when I have my foot on the pedal it will go close loop most the time and then switches back to OL-Fault .. I am low on funds and have a 6 year old I raise alone please help this is our only transportation..I think I could try this but my front 02 is on my manifold.
This worked 100% recommended. I did my 2005 v6 tacoma. I did not use the spray seafoam and just used the poured in version. I used a fluid siphon pump from harborfreight and pump it directly to the O2 sensor hole before the catalytic converter after removing the O2 air fuel ratio sensor. I installed back the sensor with anti-seize paste applied on the thread, then waited for about half an hour to soak the catalytic converter. After that, I started the truck and went to the freeway and smoke the crap out of the tail pipe. Came back and checked my live readings on my O2 sensor bank 2 on the idle and it read constant voltage and no more fluctuation and the pending code is gone. This is the best solution I saw so far that made sense and really worked.
I would like to say to anyone who reads this I used sea foam to clean my catalytic converters I removed my 02 sensors from both cats and poured a can each into each catalytic converters and let it sit for a hour then put the 02 sensors back and started my truck and boy did it smoke for about 40min then to it for a drive to blow everything out and I got to tell you my performance came back and run a lot better. So for all then non believers out there I say nothing beats a fail but a try and everyone results will be different but it will be based on your method of cleaning. It may not work for everyone but letting the sea foam soak in the catalytic converters made a huge difference. Find your method.
This is, by far, the BEST, most logical and informative video on caring for a possible faulty CAT or if one gets the dreaded 0420 code. For some insane reason, (love ya Scotty but you're wrong), dropping lacquer thinner into a gas tank when IT THEN GETS COMBUSTED WILL SERVE NO PURPOSE AFTER BEING EXHAUSTED INSIDE THE CYLINDERS AS ITS CHEMICAL STRUCTURE CHANGES...and thus does not bring the chemical cleaning properties of lacquer thinner. The method in this video introduces the wet chemical solvent direct before combustion and does the job. I have done this and it works! I would add...also put in a can of regular SeaFoam into fuel tank along with cleaning the MAF sensor. This 3 item cleaning combo eliminated my 0420 code on TWO vehicles!!!
Hi Victor, thank you awesome feedback, you are correct that bypassing the combustion chamber really increase the effectiveness of the chemicals working to clean the catalyst. Scotty Kilmer to me has been posting any rant he can. One day he says this and the next minute he is saying something else that contradicts his previous viseo. I often feel he is making video to get viewers to watch a guy sitting him his room ranting. His older videos we're a little more hands.i wish him the best of luck and there is even a simpler method that i just need to record. My promise is I post that video before the end of the year to help people just like yourself. Thank you again. _Randomfix
@@RANDOMFIX In addition, TODAY... I was servicing another vehicle, 2013 Ford Fiesta with a 0420 code. All numbers from scan tool were pointing directly to the CAT failing, not O2 sensors, not MAF, etc. There were high short term fuel trims numbers but could not locate any vacuum leaks using propane. Again, this would point to failing CAT. Today, removed pre CAT O2 and did the SeaFoam spray injection method per your video and as I have done before. Used less than half can. Re-installed sensor and drove for 10 minutes. Boy, did I start a firestorm... White smoke for miles. Caltrans workers flagging me down. Finally, a neighbor came over to complain like I was a gross polluter. Took 20 minutes for smoke to burn off. Then, I erased all the ECU memory via scan tool and drove for 30 miles to reset all PIDs on the computer, driving while monitoring scan tool. WELL!!! All sensors on this car, (42), came back 'green light' meaning, all codes came back positive including the CAT codes and temps. This method works!!! Anyone pouring lacquer thinner into a gas tank has a screw loose in their head. Does not work. Soaking a cold catylytic converter using SeaFoam Spray Top Engine Cleaner/Lubricant then driving for 20 minutes is the way to get your CAT back online providing it has not completely failed for an extended period of time. This video is a great "how to". Save $1000. Use this method.
@@victorvarisco5360 I got a avensis 2003 with p0430. Can i put some seafoam in the tank or do I have to realease the 02 sensor upstream both and go ahead like the video? Thanks for answers.
This worked for me! 2011 Jeep patriot. Thank you for this video, this was my last effort to fix the issue after spark plugs, ignition coils, and o2 sensors
@@andynuck1772 yes this fixed my issue. I can’t guarantee it will work for you, but it was running better after about an hour of driving. Lots of smoke lol. I sold it about a month ago, it kept having issues at 150k miles. Thermostat, water leak, oil leak
I do it a little different. I jack up the rear end to put the car at a slight downhill angle. I take the 02 sensor out like you did. However, I squirt in about a cup full of Dawn detergent mixed in with water. I put back the 02 sensor and leave watwr and Dawn inside overnight. The next day I start the car and run it for 20 minutes, accelerating it from time to time. The Dawn abs water softens up what is clogging the cat and the exhaust pressure cleans out the cat. So far I have never had to replace the cat and my car has over 1/2 Million miles on it.
@@RANDOMFIX it is a 2010 Nissan Sentrs SR. Yes, I did it to the Nissan after trying other things. I would buy a new CAT, but with over 250,000 Miles on the Nissan, I'm expecting a major engine or transmission repair that just won't be worth it. In the meantime, the old girl runs great, doesn't burn oil, and everything works.
2008 Honda Accord, stubborn p0420 code won’t go away despite of rislone, catclean and few more. NO SUCCESS, but today I tried your method, sprayed full can, o man!!! Did it ever smoked at least for 20 min, my neighbours thought my car or the house was on fire. So folks, don’t drive right away after using this product, you will cause an accident as drivers behind you, it’s like a white out winter storm effect. I drove 200 km today and my engine light did not show up😂 Thanks man 👍
Awesome feedback and yes the white smoke is something out of a movie. I’m glad the video was helpful for your 2008 honda accord. Now you have to set the catalyst monitor. This works like magic for older honda vehicles like civics so I how it works with your accord. ua-cam.com/video/BuZYAy_xi0E/v-deo.htmlsi=b0MOKisMjAV1Lw3q
@@RANDOMFIX I am in Ontario Canada, we don’t have emissions test here anymore. Question, my valve stem seals are burning a bit oil after idling, but not when it’s driven. Car has 313.000 km, how often should I clean the cat? Thanks again
Aaaah, I’m coming to Ajax in two weeks. It’s small world, honestly I would look to see if there is anything you can do about fixing the leaky seals as this might get Turin to keep doing. In most of us states we have emissions test so that’s why I posted these videos. Have you tried this oil leak stopper? amzn.to/3ShYdHC
@@RANDOMFIX yes I tried At-205 two weeks ago and I am using Castro full synthetic high mileage oil (5w-30 instead of 5w-20) it seems doing better, but it needs more time( we just got the car last month)
@mikevoski979 sorry to hear your inherited this issue. Just be patient and make sure you are over filling the engine oil. Are you parking on a flat surface overnight?
I had a P0420 code for the past year. I stressed, depressed & did not address until I found this video (and replaced my upstream air fuel sensor for my 4cl camry 07) and I never thought id say this but im officially one of those people that SWEARS by sea foam now because I used the whole can, and after I reconnected the terminal and started the car, the check engine light was gone. My cat was running 800 degrees lower in idle & my new air fuel sensor was at 3.3v (as it should be because my fuel was running rich before) thank you for posting this 😭😭😭🙏🫶 just helped me save 1000$ on car maintenance because everyone and their mama said I would need a new cat, it's not a sensor problem, blah blah blah but my baby is running smoother than ever at 212k (yes a camry) & even has a lil kick when I accelerate now🥰 can't thank u enough!!!
@@RANDOMFIX thank you lol I never actually had 1000$ for the car which is why I so rigorously studied this video & others to perform everything so as to only have to invest in the sea foam, air fuel sensor (denso) & dielectric grease like I did 😭thank you though🥺
@@greatdane145 When you get a code about a sensor, it's not telling you that the sensor is bad. It's telling you that the sensor is detecting an out of range measurement. Replacing an upstream sensor when it codes doesn't change the condition of the engine that led to that sensor telling you something is wrong. If you just change the sensor, it doesn't fix the problem. It just silences the code generation for a bit.
I've done this, but used carb cleaner, not sea foam. It did seem to help. One suggestion would be to get an inspection camera (they are not too expensive for a cheaper one that connects to one's phone), to actually see inside that hole. I could see the areas I sprayed and my first attempt mostly hit the side and most of the catalyst was not sprayed even thought I thought I was spraying all around.
Thank you for this amazingly helpful video. I tried this out on a 2004 Lexus GX470 that was throwing a 0420 and 0430 whenever I was at higher altitudes. Cleaned all catalytic converters on the vehicle using this method, and sure enough, codes cleared and vehicle running like a champ.
It helped some to clean out egr valve ,hoses etc. The Cataclean completely cleared up the converter.Code was cleared ,put in 89 fuel and my Chevy Eqinox has been running good for the last 3 days and nights.
Ironic how this cleaning method allows one to pass smog by releasing all the pollution it's captured into the atmosphere. BTW, this fixed my P0420 😅 Thank you! Half a can saved me from buying a Cat installed for $1,550!
It’s not epa, the epa is not strict but the California CARB is charge. It’s all about money, for example the federal warranty for emissions components is 8 years 80k miles but California has a 7 year 70k warranty instead. Think about the logic,
Been a mechanic for 40 years and not a big fan of tune up in a can but this really works. My 98 ram 2500 360 cid was running like crap. When it would get up to operating temperature it would start cutting out back fire through intake. Would kind of run at high rpm. Would idle fine and rev with out a load but put in gear and crap. Pulled out 02 sensor put in a can of Seagram. Let soak for a hour. Lots of smoke for a while but now runs great and more power than it’s had for awhile
I did this to a honda fit. The straw was more of a nuisance than an aide. Honda fit cat sits straight up behind the motor so I just remove the 02 senor as he showed. Then I at first tried the straw, then just sprayed it directly through the sensor hole w/o that straw. Worked great.
I put seafoam in a pump sprayer and did this for a stubborn exhaust p0420. O2s were new and gas cap was new and cat was 1 yr old. This solved the issue on my land rover disco 2.
@RANDOMFIX for the Cat Cleaning I sprayed in the upstream sensor hole on the manifold exhaust. I bought a gallon can of seafoam. Was successful for me and less nasty smell. And also not getting p0420 so I'll take it as a temporary success. I don't mind trying ideas. I've been using seafoam for the air intake system for years. And fuel system. Only on older cars from before 2010. With so much electronics I been using a scanner and doing proper repairs. Just because the computers are so sensitive. And I don't know enough how to correct the failure of experiments.
2002 Avalon catalyst ready test would not compete even after 500 miles and every different way of driving procedures i could find so I used 1 can per side of liquid sea foam and less then 5 minutes later the test completed so this really works
I thought of this idea. and yes found this video, that its actually been tested. I was afraid of creating a big goop blob and clogging the cat. I'll be doing this in the morning.. I'll be using B12 Berrymens
Love this info,I’ve never seen seafoam spray bottle before tho,if you don’t have a spray bottle ,this I believe would work well if you have an air compressor and spray a lot better I believe. Get a spray wand with a siphon hose attachment and drop the hose in the seafoam can ,you’ll get a lot better spray coverage
Your upstream oxygen sensor female connector looks newer. These connectors are relatively inexpensive, and not that hard to fix, so if you have an older vehicle, it is excellent preventive maintenance to go ahead and replace those female connectors. Just make sure that the wires go in the new connector EXACTLY the same as the old connector. The old connectors can often be removed simply by crushing them until they fall apart -- just don't damage the wire when doing this. Do it over a towel and all the scraps are easy to clean up. I had a coolant sensor go out and screw up my idle to the point the engine would shut down when I took my foot off the gas to press the brake to stop when the engine was cold. It never would have happened if I (or a previous owner) had put in new connectors before 340,000 miles! :-)
I saw a guy on youtubr here take a Cat apart and soak it in thinner and let it set over night. The thinner was still clean in the morning. It did nothiing,
A more sophisticated approach might be to remove the pre cat and post cat sensors. Insert a balloon post cat and inflate via a tube. Pour a gallon of lacquer thinner pre cat and let the cat soak in thinner overnight. The balloon will hold the thinner in the cat. Deflate balloon and drain.
Hi, great video my man. I have a p0420 code that comes and goes off by itself within a week or so without me resetting the light. My questions is, should I use the whole bottle? because I have a GMC Acadia with 2 converters and 2 exhaust pipes.
@RANDOMFIX Thank you so much for the your video. What I'm trying to determine now is if that oxygen sensor in the engine bay (the upstream oxygen sensor you mentioned in the video) is also called an air-fuel ratio sensor? My car is 2011 Honda Odyssey, the sensor in the engine bay is called air fuel ratio sensor,I want to make sure if both are the same thing.Looking forward to your reply.
I’m confused… if you go to the Sea Foam website under their Q&A it says that it will not clean a catalytic converter, only that it will not harm it. Perhaps they’re covering themselves from liability (?). I have the catalytic removed from my 98 Volvo. They’re is nothing wrong with it, but I need to weld the down pipes leading into it. Since it’s 25 y/o I figured I’d clean it. What about vinegar? That’s what I use on the catalytic on my wood stove.
I haven't tried vinegar personally but seaform would work. If I had it off the car I would try dawm dish soap. The whole I used seafoam was it because it was on the vehicle.
Upstream will have no effect. Downstream has a chance of being affected but the chance is small. You could remove the downstream as well if it at the 6 o’clock position or too close to catalyst
hello, great video.. thank you for sharing. I have a 2010 chevy camaro V6 with new fuel injectors... new code P0420 (Low effiiency bank 1) . dealer said most likely cat is goning bad. Do i follow same procedure for my 2010 Camaro V6?
Yes, the process is the same. Keep me posted on your success and results. I have some other tricks that can help aid in getting the catalyst ready. Are you just trying to pass an emissions test or looking for a permanent solution.
Thanks for the reply. Looking for a short to midterm solution (6 months). Saving up for a newer car. I will take whatever other tips or tricks you have
Do you do just the top o2 senseor inlet or also both o2 sensor inlet near the cataltic converter under the car too? Do you spray water down there too ti flush the system after letting it soak?
You remove the top or precast o2 sensor to spray. As far as cleaning you wound need a lot of seaform if you wanted to fill the cavity of the exhaust system to flush or wash out everything. I should the easiest way that would make the biggest difference. You could use a balloon on the downstream o2 sensor hole to plug the hole in case you wanted to fill the exhaust pipes with a cleaner or park at Angle 📐 but that is all over kill. If you don’t live in California or New York these cats are not that expensive ua-cam.com/video/en6eKzyE_80/v-deo.htmlsi=SbUAQZED3kTAbTnt if you don’t mind doing the labor.
Great. I have read some say to be sure the car is running if spraying water down the top 02 sensor near the engine to be sure no water gets in the pistons during flushing it and perhaps rev a bit on the rpm? Does that make sense to you and help avoid any issues with that?
@grega.6984 if the vehicle is running and the engine is on you no be able get anything into the up stream o2 se air hole as there will lots of pressure and heat. Some people spray into the intake with engine on past the mass air flow sensor to clean the carbon deposit. I haven’t don’t that and will be trying that as if I really want to clean it I would just take it apart and clean it. But I have had a Vw Jetta turbo that random misfire and I got some crc valve cleaner and Sprayed the whole bottle slowly as the vehicle ran and it took care my misfire and check engine light. But this depends on the vehicles, on that Vw I was really supposed to clean the intake with crushed walnut media and basically sand blast the intake once apart to get rid of all the carbon. I hope that helps, it all depends on the vehicle and what you are trying achieve? Just want to clean the catalyst? How does it take for your vehicle to detect the catalyst is not operating effectively?
I am going to VA tomorrow with tools (in NC now)...daughter car broke down there. It would not start. Got diagnosed with plugged catalytic converter. Otherwise fine. The car will not start without taking off one of the O2 sensors to relieve back pressure now. My goal is to clean it enough without taking off the catalytic converter and drive it back home 3 hours to really fix it myself at home (maybe take it off and soak it in cleaner etc). It is a 2001 lexus rx300 with 2 catalytic covertors. What do you think on ideas to get it running enough to drive home 3 hours as initial goal? I have lacquer thinner, cataclean, borescope camera, sparkplug non foulers, pressure washer etc now fyi. I was hoping taking off the top 02 sensor would start and run the car and then I was going to clean spray lacquer thinner in the upstream hole on both and cataclean direct and run rpm for 15 to 30 min. Then dump gallon of lacquer thinner and cataclean in fuel tank too so it clean while driving home with the top 02 sensor removed? Thoughts and tips considering my issue here? :) Greg p.s. of course want to avoid damaging the pistons spraying down 02 sensor with thinner, cataclean, or seafom (no water based only petroleum) with engine off is safest?
Hector from Puerto Rico. Good video and explanation. I have a camry SE 3.3 with the code P0430. I due a tune up, the car run perfect but the erase the code and about 24 hours come on. In one time turn off itself about 10 days and come on. The question is, is really bad the catalic? I is good because the car run fine and no have any issue. What are your opinion. Thanks for your information 🙏🙏
Hi Hector, Greetings from Texas to Puerto Rico 🇵🇷. Unless you have an emissions test I would not worry about it. You catalyst can old and the p420 code can turn even if there is a loss of 4 percent in efficiency. Since your is not getting triggered right away you may get lucky by doing this ua-cam.com/video/BuZYAy_xi0E/v-deo.htmlsi=W24o20r-UXeBHo8S or this if your vehicle is burning a little oil ua-cam.com/video/HkF4oCED0UU/v-deo.htmlsi=MOT758RYYBTOYCmb Here is complete playlist for incomplete catalyst monitors and some products I’ve tested. I would do what I recommend above as they don’t require you to buy anything. Keep me posted ua-cam.com/play/PLDEbtVOPRC-h1BAzaWQ-6NSnmG0gwvgwP.html&si=l06PiZBOaTRkghKK
@@RANDOMFIX Thanks for your information. My car burn 1/2 quart of oil every 4,000 to 5,000 milles I changes oil every 5,000 milles and use Mobil one for car of high miles. Thanks again. I goint to El Paso in Sunday, my son live there. Good luck.
@hectorpenamedina4817 nice, el paseo is 12 hours from me. Texas is big, you may want to try what I did on that honda. You need burn off all the oil off the catalyst. Also check your pcv valve to make sure it’s not the issue that is causing the oil consumption. If it’s anything else it’s won’t be a fix.
Just bank 2 upstream.. before you do that try clear the codes and if that is only only code then complete a drive cycle but alway warm up the van for 20 minutes so the catalyst gets nice and hot and then drive. After 1 drive cycle if all the monitors are complete except the catalyst then do this ua-cam.com/video/BuZYAy_xi0E/v-deo.htmlsi=VBMu5-Zat5kLAjKp Good luck and keep me posted.
WOW that looks like something i Should try. But I have couple of questions for you: I have 2015 Volvo xc60 3.0 T6 turbo. I get p0420 code bank 1. I tried Cataclean couple of times and the light went off for about 50 miles and then came back on. The car seems to be running ok, but I think the gas milage is a little low. I would love to try this - So do you recommend it for my car and is this a long term solution (i.e. more than 6 moths)?
The honest truth is that the only permanent fix is a new catalyst converter and it will work for some time before it goes out again. So I would try if you got over 200k mile on your xc60 but if you got little use on the vehicle then find out why the catalyst is going out so soon. Additionally, city trying kills the catalytic converter so take it on a long road high speed trip, check the fuel injector or at least clean then with a good detergent ua-cam.com/video/Edc0uPgeU8Y/v-deo.htmlsi=GKFj0o_ORGt7rH5y and check that air cleaner along mass air flow sensor cleaning and throttle body cleaning. These are all easy task and should cost you no more than $50 for all items or cleaners. You have confirmed the fuel economy is a little low so doing these has no downside and might help find the real reason for the catalyst converter premature failure. You could also have an improper seating exhaust value but that is rare.
@@RANDOMFIX i forgot to add that the car has 166k and I get 23 mpg combined 80% hwy 20% city on 93 octane (maybe that's normal?) I'll try your few suggestions. do you think it might just be faulty O2 sensor that needs replacing?
@yosico101 on a newer vehicle the o2 sensors are very sensitive and would of given you some sort of code but your p420 can also caused by an exhaust leak. It’s a matter of process of elimination. The suggestion I gave you are easy and just follow it up with a visual on the exhaust. I show where the leaks are possibly going to be on this video ua-cam.com/video/en6eKzyE_80/v-deo.htmlsi=MoBBPl944dp1eHL1
Interesting. My 2015 Jeep Grand Cherokee 3.6L developed a misfire in cylinder one while I was far from home. Drove it several hundred miles back, where I diagnosed a clogged fuel injector. Replaced all fuel injectors, which resolved the misfire, but two days later the dreaded P0420 code appeared. A bottle of Cataclean failed to resolve the P0420. Was thinking of trying another bottle. Do you think spraying Seafoam directly into the catalytic converter would be a better way to go?
Honestly since you injector was clogged I can imagine how this would lead to a p420 code unless it was spraying excessive fuel and it heated up the catalytic converters. I will reset and see what happens. If it pops back up I would spray down the upstream o2 sensor hole. Is your smog test due anytime soon? If not this is going to affect your grand Cherokee! Anything other than a new catalyst is only a temporary solution. They do make direct fit catalyst converters for this 3.6 motor and they run under $200.
@@RANDOMFIX, thanks for your response. I tried resetting the code (erased it), but it came back after two days of driving. No emissions testing this year. I have time to try different solutions. Are you saying this is only fixable with a new catalyst? Or do you think spraying the catalyst with Seafoam is worth trying?
@DEValentine it’s worth trying So you can pass and pay thousands of dollars for a part on an old vehicle. It’s only a temporary fix as it will get dirty again and since the vehicle is older it will get dirtier faster. I would not worry about a p420 code unless I had an emissions test in three months.
I got the P0420 error on my used 2016 CRV in January end. I bought the vehicle last Dec 2022 from auto dealer in Wisconsin and drove all the way back to Minneapolis. The vehicle had clean Carfax which showed regular service changes done as per Honda recommended that I verified as well before buying. The vehicle has 124,000 miles on it. When I got the CEL I took to the local Honda dealer and he charged for check engine light and erased the code via ECM/PCM. The error came back again after 4 weeks and just when I thought of going back to the dealer the code/check engine light itself disappeared for a week but came back again a couple of days back. I took it to the dealer again today and he says technician checked o2 sensor and exhaust leak and they are not a problem. He has given me an estimate now for catalytic converter change and has quoted close to $1700! I do not have the budget now and would like to try this method or May be try any other liquid catalytic cleaner via gas intake. A local mechanic suggested to try erasing the code 3 times before taking any decision spending so much money. I have now erased the code 2 times. What are your thoughts please or what do you suggest on any best liquid cleaner I can try now??? I am planning to do what you have here in the video but would like to confirm before trying the same.
@world peace ☮️ Sorry to hear about catalyst issues, so there are no permanent fixes for this other a new catalyst. With all of that said I made a whole playlist for just this issue, I think it may be a easier to find you own solution ua-cam.com/play/PLDEbtVOPRC-h1BAzaWQ-6NSnmG0gwvgwP.html and depending on what state you live there are direct connect catalyst for under $150 that I show on the playlist. If you purchase a new catalyst you have a regular muffler shop install it for less than 250. Before you install a new catalyst you need to as yourself what caused this issue? Good luck and keep me in the loop.
@worldpeace5853 what did you end up doing? I have the same problem with my CRV. I usually just put a bottle of Cataclean in the gas tank and it goes away for several months. Certainly not a permanent solution.
@@louisecoombe I tried the Cataclean but the light went off temporarily but came back again. I got it diagnosed and then changed the catalytic converter but after a month I again got the check emission but this time it is P0139 oxygen sensor thing and NOT P0420. I will need to change the downstream sensor. It is a real pain for sure.
Yes the only permanent solution is a new catalyst but please understand you do don’t need to pay 1700 for a new catalyst because they are direct catalyst for under $200. Check my catalytic converters video playslist. Here the drive cycle for the honda. ua-cam.com/video/oZELvZ4danA/v-deo.htmlsi=ov_zN-OsPndr-2s7
Can I do this for my 2014 Prius V in California with that code. The engine experienced missfire of #2. After that I fixed the engine then that code was on.
Nothing is different on your Kia, you are just bypassing the combustion chamber and the engine completely so the only parts after the exhaust is the catalyst, the muffler, resonator, and the rear oxygen sensor. If you have the money I would recommend buying a new catalyst but for most people including myself a penny saved is better than a penny earned. Keep me posted and happy holidays
Thanks for sharing this,I used the product Cataclean,however the warning light never went off,in your opinion, is this method more efficient when unclogging the converter???
@@RANDOMFIX I have a 2011 Nissan Sentra,I had it for about 3 years now. It's a right hand drive,it has high milage, however. One day about a few weeks back,the warning light came on,so I bought a bottle of Cataclean, I followed all the direction, however the warning light is still on. I will be taking it to a garage very soon.
Would you consider this a temporary fix or one that really takes care of it for some time? I don’t have any lights on, nor do I live in a state where there are inspections, but I can smell the cat going bad, and also can tell the lack of power going up hills. Just wondering. Great vid!
It’s only a temporary fix as the only fix is a new catalyst but in some places like California the cats are 1 thousand plus to about 3k. I live in text Texas in a county that doesn’t smog and if I had your issue I could confirm if the catalyst is really bad. Maybe it’s clogged badly? Then I would hallow it out! This all depends on what your driving, your vehicle might a little louder but it will gain the power if the catalyst is really the problem if clogged. Keep me posted on what you do.
Hi RandomFix... I have a 2018 F150 with 2.7 Ecoboost and got a P430 code. I did this method and used up only half of the can of seafoam then drove it for over 50 miles. The check engine light did not come off. I also tapped on the Cat with a rubber mallet and did not hear any rattling sound. Should i go back and use the entire can? Update: So, I did this again two more times. And each time I sprayed the seafoam I would also soak it for an hour before driving on the freeway for about 50 miles then I wait for about a week to do the next treatment. Then before I went to emissions test, I dropped a bottle of the CRC guarantee pass and the code didn't show back up. Its been about a month now and everything seems to be okay. Also my mpg increased from 18 to 21.4!
Using a can of liquid vs spray may not get the sea foam evenly as you can use the plastic tube from the spray type to point the spray to the whole converter rather than just the part by the sensor hole. just my thoughts.
Great feedback. And even pcv valve should be included on this list. I had to find this out the hard way on a 2013 nissan Altima that causes p0102 or 101 dtc. Lots of mechanics had tried replacing the maf sensor but in the engine it was pcv valve. Thanks you sharing.
Are use the crows foot style O2 sensor remover. The other ones are junk. I know I do this every single day all they do is spread use the crows foot 02 sensor remover. He will get it out if it seized you replacing it break the porcelain off, heated up and put a shallow six point socket of it and it’ll come right out. There’s seals in the connector joker. and on the tools use a happy inch drive because you’re going to need some leverage at 3/8 drive will not do it so you’ll have to get the reducer and use half-inch extensions three eights for flex all over the place you will not get it. I’ve pulled too many out I know get the adapter half inch to three eights this clown. He doesn’t know what tools he needs.
mine must be really plugged. I went through the process with a half a can on each side. I can't tell where it did much at all. I'm gonna let it cool and do it again. And then I might be barking up the wrong tree, but to me it seems like back pressure building. It dies after a couple of minutes. I even thought it could be a plugged fuel line, but it is not the same.
Reducing restrictions on the engine such as removing catalytic converters doesn’t not damage the engine however there are laws that prevent you from removing the catalytic converters and these are enforced by smog checks. Good luck 🍀 Leaving the clogged catalytic converters will damage your engine if untreated.
Sure it will work on your Cruze. Just make sure that all the other monitors are set that are need to pass and that there are no pending codes before you try this first as it requires no actual mechanical labor ua-cam.com/video/BuZYAy_xi0E/v-deo.htmlsi=MrrqqUKDQSYbQz1j Keep me posted and good luck! 🍀
Nope just explain it better so people don’t have to drive around endlessly and also if they vehicle will pass with one unset evap monitor they should not refuse to do the test.
Ok I have replaced 02 sensors and still getting code grrrrr! So my truck is a 2017 GMC Sierra that GMC had to replace the motor because of the lifter issue . Check engine light came on after I got it back, I think this happened because of the failure on the right side of my engine . Code is for bank 2 cat which is the passenger side cat. It is a new motor so I’m going to try this and see if it works, fingers crossed. I will let you all know if this solves my issue .
@@RANDOMFIX how long do u think I should let it soak? I did it this evening and it’s been sitting for about an hour. Oh I also added a can to the fuel ! The spray can came with a can to put in the fuel tank .
they never show the comparison of before and after and then driving the 40-60 miles after cleaning the and then erasing the code.... Id like to see them show and prove that spraying seafoam in the cat actually works.
well I can say I did this and it worked for me. I didn't drive 40-60 miles I just started and let it run until most of the seafoam burned off. I then drove it around my neighborhood for maybe at the most 10 minutes. During that time I would see the seafoam still burn off, like when stopped at a stop sign I would see a puff of white smoke and during take off. It then all cleared out. Also I did clear all my codes before I went for test drive.
I tried this two years ago, thinking that spraying directly through A/F sensor was pretty sophisticated, all it did was make a ton of smoke and wipe out the neighbors, but cleaned nothing. I also never use dielectric grease or anti-seize. All not the best ideas.
@@robertrose3068 I use the anti-seize that comes with parts, but I don't overuse and get more for everything, like lug nuts, etc. In this case my upstream O2 sensor was for Corolla and it has a flange with two studs/nuts, not threaded into exhaust pipe - so I don't think I used antiseize on those studs.
I wish my O2 sensor is easy as this video, I have a Toyota Prius, the Amazon o2 sensor removal doesn’t fit and I’ve seen some people have to cut the heat shield to able to replace them. It’s a nightmare.
Why not just remove it and clean it? Or you can buy a direct fit for 118 catalytic converter ua-cam.com/video/Wr1vFqCnpDc/v-deo.htmlsi=6aLLk2DUJRGRgD2F and there you will find other ideas as well.
@@RANDOMFIX sounds good, thanks. i'm gonna try this on a 2011 subaru tribeca with 3.6L h6 engine, got a p0420 code on bank 1. swapped both 02 sensors, and air filter, and attempted an exhaust smoke test to see if there was a leak. subaru dealer wants 3k to change out the bank 1 cat. we will report back if this helps us!
It would be the same process but way look into some way of angling the vehicle up so the fluid does not pour out as you might be using a lot of seafoam. Others have mentioned using a balloon 🎈 on the rear o2 sensor hole.
The downstream oxygen sensor code is on. I had it replaced and it’s still on. Mechanic recommended I change the converter(he doesn’t do that so it’s not like he’s trying to make money off me). Might try this.
So I have a p0420 code that I’ve been. dealing with , the voltage on the downstream is doing the same as the upstream. I was doing a drive cycle the all monitors set except the evap and the oxygen monitor at first but then as soon as the oxygen monitor set the p0420 code came back I recently changed up the upstream so do you think the downstream is just faulty ?
It could be or maybe a very poor functioning catalyst. I would try catacllean or the duralast catalyst treatment ( cheaper) and see how things go. Really let the vehicle warm up and figure out what is your goal. Is it just to pass this year or fix the problem?
Late to the show but sometimes O2 sensors (or any aftermarket parts) are bad right out of the box. Make sure your replacement parts are actually working.
I haven’t had any complaints about this but if you have the access to downstream o2 sensor than remove if it on the lowest part of the exhaust. I don’t think you are putting in that much fluid to fill the cavity. Good luck and keep me posted about your success. If you catalyst is borderline you may get away with some of the other methods I show in the catalyst monitor playlist. ua-cam.com/play/PLDEbtVOPRC-h1BAzaWQ-6NSnmG0gwvgwP.html I would try the 3 k trick first as it’s free and no work is really required.
@@RANDOMFIXcan you explain a little into more detail about the baloon method im a bit confused, what do i put the baloon over? and do i do this when i start the engine? its safe for the car?
I got the check engine light Po420 code in my 2010 Ford Focus when I drive 35-50 minutes on the highway it will disappear and come back two days time on the dash but the code is still in the module? What to do
If you vehicle has an inspection due than get it ready by performing a drive cycle but if there is no inspection due then keep on driving as it does not affect the performance. Just make sure you don’t need new spark plugs and that your fuel injectors are not clogged.
@@bobz4 put the sea foam on cat one. Only two cats (bank 1 & 2)replace both 2nd bank sensors. Now PO420 & PO430 popped up a month later. All from a bad intake pipe that leaned out the car!
Seafoam is aggressive and necessary used correctly and you will be amazed with the results going to vacuum first second do the gas treatment third to the oil treatment for Fourth sprayed directly into the cat as this video it showed gas mileage performance piece of mine are waiting for you
Chris, Great information. Thank you😁 Can I get your help? CHECK OUT MY OTHER CHANNEL and subscriber if you like it. THANK YOU ▶️ ua-cam.com/channels/-wuhWwzZnFOWK-GMsP6Ejw.html MANY THANKS _Randomfix
Yes this work helpful but lots of people have a hand luck with your civic on on this method ua-cam.com/video/BuZYAy_xi0E/v-deo.htmlsi=Iyphm41KqlSn8cui I would try the above method first as long as your vehicle doesn’t detect the p430 right away. Keep me posted on what better for you.
Had the cat fail on our 2001 Nissan after my beloved forgot to put oil in her car. I am wondering of its too far gone since it is now clogged to the level that it is effecting the cars performance. Any thoughts?
If oil wasn't put in the car, I'm afraid the cat is the least of your worries. Your engine is most likely fucked up. At least you can run a car without a cat if you don't live in CA as far as I know
Thankfully we caught it in time. Wishing I had tried this method since when I pulled the cat it was blocked but not broken up. I'm sure this or the the soaking method would have done the trick. 2 bolts broke off and the project is gaining I'm scope. I'm ordering a new cat and going to drill out the bolts.
Once the converter ages it requires cleaning more often, so in California that about every two years. And based on your driving habits, freeway vs stop and go traffics. The freeway and high speeds keep the converter cleaner.
▶️Complete smog playlist ua-cam.com/play/PLDEbtVOPRC-h4WB90arPwdn_r7wr3kGki.html
▶️Catalyst monitor not ready? ua-cam.com/video/hi7QdlgKHzM/v-deo.html
▶️Catalyst not ready? Watch this video
ua-cam.com/video/ERQUUdWo3-o/v-deo.html
▶️Evap monitor not ready? ua-cam.com/video/99nfTcPy4fo/v-deo.html
▶️EGR monitor not ready? ua-cam.com/video/aujgghRf04I/v-deo.html
▶️Oxygen sensor not ready? ua-cam.com/video/sAvxeAyYsRk/v-deo.html
▶️Link to Scanner in video amzn.to/2BZYqWo
▶️▶️▶️Video about recommend Full Color Scanner ua-cam.com/video/qpHeVGH_6uA/v-deo.html
▶️Link to this full-color scanner amzn.to/2z0YTcF
@RANDOMFIX I need some help.. 2009 aveo p0301 and p0420 code I have replaced cam sensors crankshaft sensor fuel pump relay because it stopped starting and started once it was replaced... coils and plugs and an oem downstream 02 sensor to clear all other codes I have except these 2 the p0420 came on after using some.system cleaners realized last week my intake hose had a huge slit on the bottom and replaced it still have p0420 and p0301. I am losing power misfiring and horrible fuel efficiency. I have been looking at live data on my chesp obd reader it doesn't have graphs but does have the data I just don't know what they should be... Anyway, after intake hose replaced p0420 went away for a cpl days but it's back and still same issues. Prior to intake hose CATTEMP1 was reading 3 to 500F now it's reading 1000 to all the way up to 1475 today is that OK? and what would u think the issue is ? Fuel trims seem to be bouncing around a lot and reader also showing open loop fault and open loop driver even with engine hot when I have my foot on the pedal it will go close loop most the time and then switches back to OL-Fault .. I am low on funds and have a 6 year old I raise alone please help this is our only transportation..I think I could try this but my front 02 is on my manifold.
This worked 100% recommended. I did my 2005 v6 tacoma. I did not use the spray seafoam and just used the poured in version. I used a fluid siphon pump from harborfreight and pump it directly to the O2 sensor hole before the catalytic converter after removing the O2 air fuel ratio sensor. I installed back the sensor with anti-seize paste applied on the thread, then waited for about half an hour to soak the catalytic converter. After that, I started the truck and went to the freeway and smoke the crap out of the tail pipe. Came back and checked my live readings on my O2 sensor bank 2 on the idle and it read constant voltage and no more fluctuation and the pending code is gone. This is the best solution I saw so far that made sense and really worked.
Thanks for sharing your experience on your 2005 Tacoma and your success. I appreciate you taking the time to post this feedback
Hi this works?? Can you reply i have toyota tacoma v6 2008 whit this code say catalityc bad
You can use an air compressor with a siphon hose adapter on it,place it in the seafoam bottle and get good spray into the cat.
Nice ! Did you use the whole can ?
I have a 2006 taco and I have 2 af sensors...did you have the 4.0 or the 2.7?
I would like to say to anyone who reads this I used sea foam to clean my catalytic converters I removed my 02 sensors from both cats and poured a can each into each catalytic converters and let it sit for a hour then put the 02 sensors back and started my truck and boy did it smoke for about 40min then to it for a drive to blow everything out and I got to tell you my performance came back and run a lot better. So for all then non believers out there I say nothing beats a fail but a try and everyone results will be different but it will be based on your method of cleaning. It may not work for everyone but letting the sea foam soak in the catalytic converters made a huge difference. Find your method.
make a youtube vid
How much did u pour in?
A can for each cat
@@anthonyslaughter1419 how long did it last for?
@@khoirani507 till I sold it, so a couple of months. I figure ones results will very based on how bad they are and how long you let them soak.
This is, by far, the BEST, most logical and informative video on caring for a possible faulty CAT or if one gets the dreaded 0420 code. For some insane reason, (love ya Scotty but you're wrong), dropping lacquer thinner into a gas tank when IT THEN GETS COMBUSTED WILL SERVE NO PURPOSE AFTER BEING EXHAUSTED INSIDE THE CYLINDERS AS ITS CHEMICAL STRUCTURE CHANGES...and thus does not bring the chemical cleaning properties of lacquer thinner. The method in this video introduces the wet chemical solvent direct before combustion and does the job. I have done this and it works! I would add...also put in a can of regular SeaFoam into fuel tank along with cleaning the MAF sensor. This 3 item cleaning combo eliminated my 0420 code on TWO vehicles!!!
Hi Victor, thank you awesome feedback, you are correct that bypassing the combustion chamber really increase the effectiveness of the chemicals working to clean the catalyst. Scotty Kilmer to me has been posting any rant he can. One day he says this and the next minute he is saying something else that contradicts his previous viseo. I often feel he is making video to get viewers to watch a guy sitting him his room ranting. His older videos we're a little more hands.i wish him the best of luck and there is even a simpler method that i just need to record. My promise is I post that video before the end of the year to help people just like yourself. Thank you again. _Randomfix
@@RANDOMFIX I agree with everything you just said. TY
@@RANDOMFIX In addition, TODAY... I was servicing another vehicle, 2013 Ford Fiesta with a 0420 code. All numbers from scan tool were pointing directly to the CAT failing, not O2 sensors, not MAF, etc. There were high short term fuel trims numbers but could not locate any vacuum leaks using propane. Again, this would point to failing CAT. Today, removed pre CAT O2 and did the SeaFoam spray injection method per your video and as I have done before. Used less than half can. Re-installed sensor and drove for 10 minutes. Boy, did I start a firestorm... White smoke for miles. Caltrans workers flagging me down. Finally, a neighbor came over to complain like I was a gross polluter. Took 20 minutes for smoke to burn off. Then, I erased all the ECU memory via scan tool and drove for 30 miles to reset all PIDs on the computer, driving while monitoring scan tool. WELL!!! All sensors on this car, (42), came back 'green light' meaning, all codes came back positive including the CAT codes and temps. This method works!!! Anyone pouring lacquer thinner into a gas tank has a screw loose in their head. Does not work. Soaking a cold catylytic converter using SeaFoam Spray Top Engine Cleaner/Lubricant then driving for 20 minutes is the way to get your CAT back online providing it has not completely failed for an extended period of time. This video is a great "how to". Save $1000. Use this method.
@@victorvarisco5360 I got a avensis 2003 with p0430. Can i put some seafoam in the tank or do I have to realease the 02 sensor upstream both and go ahead like the video? Thanks for answers.
Release the the upstream oxygen sensor and use the seafoam. This is most direct method. The gas tanks is not as effective.
This worked for me! 2011 Jeep patriot.
Thank you for this video, this was my last effort to fix the issue after spark plugs, ignition coils, and o2 sensors
Glad to hear this worked on your 2012 keep patriot. Thank you for sharing your experience
Still good?
@@andynuck1772 yes this fixed my issue. I can’t guarantee it will work for you, but it was running better after about an hour of driving. Lots of smoke lol.
I sold it about a month ago, it kept having issues at 150k miles. Thermostat, water leak, oil leak
I do it a little different. I jack up the rear end to put the car at a slight downhill angle. I take the 02 sensor out like you did. However, I squirt in about a cup full of Dawn detergent mixed in with water. I put back the 02 sensor and leave watwr and Dawn inside overnight. The next day I start the car and run it for 20 minutes, accelerating it from time to time. The Dawn abs water softens up what is clogging the cat and the exhaust pressure cleans out the cat. So far I have never had to replace the cat and my car has over 1/2 Million miles on it.
Thank you for the feedback and this great information!
what you are driving and have you done what you shared in your comment?
@@RANDOMFIX it is a 2010 Nissan Sentrs SR. Yes, I did it to the Nissan after trying other things. I would buy a new CAT, but with over 250,000 Miles on the Nissan, I'm expecting a major engine or transmission repair that just won't be worth it. In the meantime, the old girl runs great, doesn't burn oil, and everything works.
Great idea
@@JR-kk6ce if it doesn’t burn oil and everything works great, why would you be expecting a major repair on the transmission or engine?
Trans. Its a nissan
2008 Honda Accord, stubborn p0420 code won’t go away despite of rislone, catclean and few more. NO SUCCESS, but today I tried your method, sprayed full can, o man!!! Did it ever smoked at least for 20 min, my neighbours thought my car or the house was on fire. So folks, don’t drive right away after using this product, you will cause an accident as drivers behind you, it’s like a white out winter storm effect. I drove 200 km today and my engine light did not show up😂
Thanks man 👍
Awesome feedback and yes the white smoke is something out of a movie. I’m glad the video was helpful for your 2008 honda accord. Now you have to set the catalyst monitor. This works like magic for older honda vehicles like civics so I how it works with your accord. ua-cam.com/video/BuZYAy_xi0E/v-deo.htmlsi=b0MOKisMjAV1Lw3q
@@RANDOMFIX I am in Ontario Canada, we don’t have emissions test here anymore.
Question, my valve stem seals are burning a bit oil after idling, but not when it’s driven. Car has 313.000 km, how often should I clean the cat?
Thanks again
Aaaah, I’m coming to Ajax in two weeks. It’s small world, honestly I would look to see if there is anything you can do about fixing the leaky seals as this might get Turin to keep doing. In most of us states we have emissions test so that’s why I posted these videos. Have you tried this oil leak stopper? amzn.to/3ShYdHC
@@RANDOMFIX yes I tried At-205 two weeks ago and I am using Castro full synthetic high mileage oil (5w-30 instead of 5w-20) it seems doing better, but it needs more time( we just got the car last month)
@mikevoski979 sorry to hear your inherited this issue. Just be patient and make sure you are over filling the engine oil. Are you parking on a flat surface overnight?
I had a P0420 code for the past year. I stressed, depressed & did not address until I found this video (and replaced my upstream air fuel sensor for my 4cl camry 07) and I never thought id say this but im officially one of those people that SWEARS by sea foam now because I used the whole can, and after I reconnected the terminal and started the car, the check engine light was gone. My cat was running 800 degrees lower in idle & my new air fuel sensor was at 3.3v (as it should be because my fuel was running rich before) thank you for posting this 😭😭😭🙏🫶 just helped me save 1000$ on car maintenance because everyone and their mama said I would need a new cat, it's not a sensor problem, blah blah blah but my baby is running smoother than ever at 212k (yes a camry) & even has a lil kick when I accelerate now🥰 can't thank u enough!!!
I’m glad the video helped with your Camry and setting the monitors and getting you a pass. Enjoy that $1000 on something fun!!! Happy Memorial Day.
@@RANDOMFIX thank you lol I never actually had 1000$ for the car which is why I so rigorously studied this video & others to perform everything so as to only have to invest in the sea foam, air fuel sensor (denso) & dielectric grease like I did 😭thank you though🥺
1000 bucks for a cat is outrageous!
Well why didn’t you replace that sensor a year ago… kinda weird
I feel you on what you were saying. Stress and depression are nothing worse than dumping money on car repairs.
@@greatdane145 When you get a code about a sensor, it's not telling you that the sensor is bad. It's telling you that the sensor is detecting an out of range measurement. Replacing an upstream sensor when it codes doesn't change the condition of the engine that led to that sensor telling you something is wrong. If you just change the sensor, it doesn't fix the problem. It just silences the code generation for a bit.
I've done this, but used carb cleaner, not sea foam. It did seem to help. One suggestion would be to get an inspection camera (they are not too expensive for a cheaper one that connects to one's phone), to actually see inside that hole. I could see the areas I sprayed and my first attempt mostly hit the side and most of the catalyst was not sprayed even thought I thought I was spraying all around.
I appreciate your feedback Sorry for the late reply, did you get this handled?
Thank you for this amazingly helpful video. I tried this out on a 2004 Lexus GX470 that was throwing a 0420 and 0430 whenever I was at higher altitudes. Cleaned all catalytic converters on the vehicle using this method, and sure enough, codes cleared and vehicle running like a champ.
Glad to help with your gx470 and thank you for the great feedback
It helped some to clean out egr valve ,hoses etc. The Cataclean completely cleared up the converter.Code was cleared ,put in 89 fuel and my Chevy Eqinox has been running good for the last 3 days and nights.
It worked for my car. THANK YOU SIR! 🙂
Jed, I'm glad the video was helpful. Thanks for taking the time to post. I really appreciate it.
Ironic how this cleaning method allows one to pass smog by releasing all the pollution it's captured into the atmosphere.
BTW, this fixed my P0420 😅
Thank you! Half a can saved me from buying a Cat installed for $1,550!
😂
😂 That kinda defeated the purpose of the Catalytic Converter lol, hell I'm doing mine at night! Wait until the EPA gets wind of this! 😂
It’s not epa, the epa is not strict but the California CARB is charge. It’s all about money, for example the federal warranty for emissions components is 8 years 80k miles but California has a 7 year 70k warranty instead. Think about the logic,
I’m in CA and was tempted to do this but your right it defeats the purpose and don’t want to contribute more bad air to the planet.
Cats don't capture pollution or they would NOT be called a "Converter"!
Converters convert from one thing to another.
Been a mechanic for 40 years and not a big fan of tune up in a can but this really works. My 98 ram 2500 360 cid was running like crap. When it would get up to operating temperature it would start cutting out back fire through intake. Would kind of run at high rpm. Would idle fine and rev with out a load but put in gear and crap. Pulled out 02 sensor put in a can of Seagram. Let soak for a hour. Lots of smoke for a while but now runs great and more power than it’s had for awhile
Thank you for the great feedback and I am glad the method helped with your 1998 dodge ram.
I did this to a honda fit. The straw was more of a nuisance than an aide. Honda fit cat sits straight up behind the motor so I just remove the 02 senor as he showed. Then I at first tried the straw, then just sprayed it directly through the sensor hole w/o that straw. Worked great.
any codes clear or improvement?
Yes, this will help clean the catalyst. I think this is a better method than putting anything in your gas tank
Thank you for your helpful info I have a Honda civic same problem and I will try your advice and see if it helps me thank you
@@randolphjones4814
Have you tired 😂 dealing with same prob thinking about this method but I don’t have a computer to clear codes …
I’m just now doin it and it worked thank you man keep these videos coming all the stressing I was doin for nun
Thank you buddy for the kind feedback and I am glad I was able to help you out with your catalyst converter problems.
This method worked great the check engine light went off...Thanks for the info and details
I put seafoam in a pump sprayer and did this for a stubborn exhaust p0420. O2s were new and gas cap was new and cat was 1 yr old. This solved the issue on my land rover disco 2.
Did you spray into the o2 sensor hole or past the mass air flow sensor?
@RANDOMFIX for the Cat Cleaning I sprayed in the upstream sensor hole on the manifold exhaust. I bought a gallon can of seafoam. Was successful for me and less nasty smell. And also not getting p0420 so I'll take it as a temporary success. I don't mind trying ideas. I've been using seafoam for the air intake system for years. And fuel system. Only on older cars from before 2010. With so much electronics I been using a scanner and doing proper repairs. Just because the computers are so sensitive. And I don't know enough how to correct the failure of experiments.
Very informative video! Beats buying Catacleaner for $26.00 anytime!
Thanks my brother awesome information!
If you run seafoam through the air intake, will it clean carbon from the valves and also clean the catalitic converter
It won’t be as effective as doing it that way will not bypass the combustion chamber.
2002 Avalon catalyst ready test would not compete even after 500 miles and every different way of driving procedures i could find so I used 1 can per side of liquid sea foam and less then 5 minutes later the test completed so this really works
How long did it last for?
@@Usercs7273 no check engine light yet
@@socalchaos714still going strong? Really nervous about spraying anything in it or putting anything in my gas tank?
@tinotabares6034 it's still running.
@@socalchaos714 which can of seafoam did you use?
I thought of this idea. and yes found this video, that its actually been tested. I was afraid of creating a big goop blob and clogging the cat. I'll be doing this in the morning.. I'll be using B12 Berrymens
How’d it go? Any updates? Why B12 berry over sea foam?
he drove it in a lake@@JRESHOW
Did it work? If so what did you use?
Love this info,I’ve never seen seafoam spray bottle before tho,if you don’t have a spray bottle ,this I believe would work well if you have an air compressor and spray a lot better I believe.
Get a spray wand with a siphon hose attachment and drop the hose in the seafoam can ,you’ll get a lot better spray coverage
Thinking of doing this.
Yes the thinner work for me it been 2 years sent I by a 02 also no more black tip muffler
Awesome, thanks for sharing your success
i will try sea foam into catalyst c thanks show youtube smile
Sorry for the late reply, I appreciate your feedback
Looks like this extraordinary method works 😮, I would like to know the amount of SEAFOAM I should use for my daughter’s car , thanks in advance .
Keeps on the vehicle, I would buy two cans as some vehicles have a bank 1 and bank two. Most 4 cylinder will be okay with 1 can.
@@RANDOMFIX THANKS ! 👍💪
Thank you RFIX, It worked for my 2010 Rav 4.
Glad to help on your 2010 rav4
Your upstream oxygen sensor female connector looks newer. These connectors are relatively inexpensive, and not that hard to fix, so if you have an older vehicle, it is excellent preventive maintenance to go ahead and replace those female connectors. Just make sure that the wires go in the new connector EXACTLY the same as the old connector. The old connectors can often be removed simply by crushing them until they fall apart -- just don't damage the wire when doing this. Do it over a towel and all the scraps are easy to clean up. I had a coolant sensor go out and screw up my idle to the point the engine would shut down when I took my foot off the gas to press the brake to stop when the engine was cold. It never would have happened if I (or a previous owner) had put in new connectors before 340,000 miles! :-)
I saw a guy on youtubr here take a Cat apart and soak it in thinner and let it set over night. The thinner was still clean in the morning. It did nothiing,
I appreciate your constructive comments, thank you for the feedback!
I am very very and very thank you for sharing heart karma kindness video clip.thank you.
I go to the dallar store, and buy the small brush kit from the crafs department, the small brush works great, very little needed
Would the liquid SeaFoam be more effective or is it better to use the spray can?
This is the Coolest Video i ever seen That Smoke thow your Car is High AF 😮😊
Lol, yeah just don’t hit the road right away as you will cause a crash.
A more sophisticated approach might be to remove the pre cat and post cat sensors. Insert a balloon post cat and inflate via a tube. Pour a gallon of lacquer thinner pre cat and let the cat soak in thinner overnight. The balloon will hold the thinner in the cat. Deflate balloon and drain.
Might the lacquer thinner be too strong for the Cat?
Good idea but balloon would probably just melt
I appreciate your constructive comments, thank you for the feedback!
@@maranatha3333since it's palladium it wouldn't hurt a cat at all
@@RANDOMFIX Cats and EGR systems should always be removed. Stop giving out bad advice. Don't fix it. Remove it.
Hi, great video my man. I have a p0420 code that comes and goes off by itself within a week or so without me resetting the light. My questions is, should I use the whole bottle? because I have a GMC Acadia with 2 converters and 2 exhaust pipes.
Robert, thanks for the great feedback.
Yes, use the whole bottle.
@RANDOMFIX Thank you so much for the your video. What I'm trying to determine now is if that oxygen sensor in the engine bay (the upstream oxygen sensor you mentioned in the video) is also called an air-fuel ratio sensor? My car is 2011 Honda Odyssey, the sensor in the engine bay is called air fuel ratio sensor,I want to make sure if both are the same thing.Looking forward to your reply.
Yes, it’s same thing for the purposes of this video, it’s only before the catalyst. This is known as the upstream or o2 sensor.
@@RANDOMFIX can i spray seafoam spray into my downstream catalytic converter also while im at it?
I’m confused… if you go to the Sea Foam website under their Q&A it says that it will not clean a catalytic converter, only that it will not harm it. Perhaps they’re covering themselves from liability (?). I have the catalytic removed from my 98 Volvo. They’re is nothing wrong with it, but I need to weld the down pipes leading into it. Since it’s 25 y/o I figured I’d clean it. What about vinegar? That’s what I use on the catalytic on my wood stove.
I haven't tried vinegar personally but seaform would work. If I had it off the car I would try dawm dish soap. The whole I used seafoam was it because it was on the vehicle.
Gonna give this a shot on my 2012 focus. It’s worth a shot
Thank you for the feedback!
I've found, when replacing the O2 sensor, just cut the wire and use a regular 6 point socket or a box wrench when access permits.
Thank for sharing and I hear you. I just hate cutting something eventhough I know I will just tossing it trash.
But, you'll need the tool to torque the new one in.
Yes. Why not? Its trash. Amd way easier then those crappy sensor sockets that bend and break. 💯
O2 sensor wrench is the only way to go for me.
but does it affect upstream and downstream Afterwards? running it it doesn't get on o2 sensors after?
Upstream will have no effect. Downstream has a chance of being affected but the chance is small. You could remove the downstream as well if it at the 6 o’clock position or too close to catalyst
hello, great video.. thank you for sharing. I have a 2010 chevy camaro V6 with new fuel injectors... new code P0420 (Low effiiency bank 1) . dealer said most likely cat is goning bad. Do i follow same procedure for my 2010 Camaro V6?
Yes, the process is the same.
Keep me posted on your success and results.
I have some other tricks that can help aid in getting the catalyst ready.
Are you just trying to pass an emissions test or looking for a permanent solution.
Thanks for the reply. Looking for a short to midterm solution (6 months). Saving up for a newer car. I will take whatever other tips or tricks you have
I’m wondering just how many cans of the seafoam cleaner should I use?
Do you do just the top o2 senseor inlet or also both o2 sensor inlet near the cataltic converter under the car too? Do you spray water down there too ti flush the system after letting it soak?
You remove the top or precast o2 sensor to spray. As far as cleaning you wound need a lot of seaform if you wanted to fill the cavity of the exhaust system to flush or wash out everything. I should the easiest way that would make the biggest difference. You could use a balloon on the downstream o2 sensor hole to plug the hole in case you wanted to fill the exhaust pipes with a cleaner or park at Angle 📐 but that is all over kill. If you don’t live in California or New York these cats are not that expensive ua-cam.com/video/en6eKzyE_80/v-deo.htmlsi=SbUAQZED3kTAbTnt if you don’t mind doing the labor.
Great. I have read some say to be sure the car is running if spraying water down the top 02 sensor near the engine to be sure no water gets in the pistons during flushing it and perhaps rev a bit on the rpm? Does that make sense to you and help avoid any issues with that?
@grega.6984 if the vehicle is running and the engine is on you no be able get anything into the up stream o2 se air hole as there will lots of pressure and heat. Some people spray into the intake with engine on past the mass air flow sensor to clean the carbon deposit. I haven’t don’t that and will be trying that as if I really want to clean it I would just take it apart and clean it.
But I have had a Vw Jetta turbo that random misfire and I got some crc valve cleaner and Sprayed the whole bottle slowly as the vehicle ran and it took care my misfire and check engine light. But this depends on the vehicles, on that Vw I was really supposed to clean the intake with crushed walnut media and basically sand blast the intake once apart to get rid of all the carbon.
I hope that helps, it all depends on the vehicle and what you are trying achieve? Just want to clean the catalyst? How does it take for your vehicle to detect the catalyst is not operating effectively?
I am going to VA tomorrow with tools (in NC now)...daughter car broke down there. It would not start. Got diagnosed with plugged catalytic converter. Otherwise fine. The car will not start without taking off one of the O2 sensors to relieve back pressure now. My goal is to clean it enough without taking off the catalytic converter and drive it back home 3 hours to really fix it myself at home (maybe take it off and soak it in cleaner etc). It is a 2001 lexus rx300 with 2 catalytic covertors. What do you think on ideas to get it running enough to drive home 3 hours as initial goal? I have lacquer thinner, cataclean, borescope camera, sparkplug non foulers, pressure washer etc now fyi. I was hoping taking off the top 02 sensor would start and run the car and then I was going to clean spray lacquer thinner in the upstream hole on both and cataclean direct and run rpm for 15 to 30 min. Then dump gallon of lacquer thinner and cataclean in fuel tank too so it clean while driving home with the top 02 sensor removed? Thoughts and tips considering my issue here? :) Greg p.s. of course want to avoid damaging the pistons spraying down 02 sensor with thinner, cataclean, or seafom (no water based only petroleum) with engine off is safest?
Hector from Puerto Rico. Good video and explanation. I have a camry SE 3.3 with the code P0430. I due a tune up, the car run perfect but the erase the code and about 24 hours come on. In one time turn off itself about 10 days and come on. The question is, is really bad the catalic? I is good because the car run fine and no have any issue. What are your opinion. Thanks for your information 🙏🙏
Hi Hector,
Greetings from Texas to Puerto Rico 🇵🇷.
Unless you have an emissions test I would not worry about it.
You catalyst can old and the p420 code can turn even if there is a loss of 4 percent in efficiency. Since your is not getting triggered right away you may get lucky by doing this ua-cam.com/video/BuZYAy_xi0E/v-deo.htmlsi=W24o20r-UXeBHo8S or this if your vehicle is burning a little oil
ua-cam.com/video/HkF4oCED0UU/v-deo.htmlsi=MOT758RYYBTOYCmb
Here is complete playlist for incomplete catalyst monitors and some products I’ve tested. I would do what I recommend above as they don’t require you to buy anything. Keep me posted
ua-cam.com/play/PLDEbtVOPRC-h1BAzaWQ-6NSnmG0gwvgwP.html&si=l06PiZBOaTRkghKK
@@RANDOMFIX Thanks for your information. My car burn 1/2 quart of oil every 4,000 to 5,000 milles I changes oil every 5,000 milles and use Mobil one for car of high miles. Thanks again.
I goint to El Paso in Sunday, my son live there. Good luck.
@hectorpenamedina4817 nice, el paseo is 12 hours from me. Texas is big, you may want to try what I did on that honda. You need burn off all the oil off the catalyst. Also check your pcv valve to make sure it’s not the issue that is causing the oil consumption. If it’s anything else it’s won’t be a fix.
@@RANDOMFIX Ok. I try first. Thank again.
My 2012 Odyssey has 3 cats, the bank 2 is throwing codes. Would i need to use it on the first one upstream, second or both?
Just bank 2 upstream.. before you do that try clear the codes and if that is only only code then complete a drive cycle but alway warm up the van for 20 minutes so the catalyst gets nice and hot and then drive. After 1 drive cycle if all the monitors are complete except the catalyst then do this ua-cam.com/video/BuZYAy_xi0E/v-deo.htmlsi=VBMu5-Zat5kLAjKp
Good luck and keep me posted.
WOW that looks like something i Should try. But I have couple of questions for you: I have 2015 Volvo xc60 3.0 T6 turbo. I get p0420 code bank 1. I tried Cataclean couple of times and the light went off for about 50 miles and then came back on. The car seems to be running ok, but I think the gas milage is a little low. I would love to try this - So do you recommend it for my car and is this a long term solution (i.e. more than 6 moths)?
The honest truth is that the only permanent fix is a new catalyst converter and it will work for some time before it goes out again.
So I would try if you got over 200k mile on your xc60 but if you got little use on the vehicle then find out why the catalyst is going out so soon. Additionally, city trying kills the catalytic converter so take it on a long road high speed trip, check the fuel injector or at least clean then with a good detergent ua-cam.com/video/Edc0uPgeU8Y/v-deo.htmlsi=GKFj0o_ORGt7rH5y and check that air cleaner along mass air flow sensor cleaning and throttle body cleaning. These are all easy task and should cost you no more than $50 for all items or cleaners. You have confirmed the fuel economy is a little low so doing these has no downside and might help find the real reason for the catalyst converter premature failure.
You could also have an improper seating exhaust value but that is rare.
@@RANDOMFIX i forgot to add that the car has 166k and I get 23 mpg combined 80% hwy 20% city on 93 octane (maybe that's normal?)
I'll try your few suggestions. do you think it might just be faulty O2 sensor that needs replacing?
@yosico101 on a newer vehicle the o2 sensors are very sensitive and would of given you some sort of code but your p420 can also caused by an exhaust leak.
It’s a matter of process of elimination. The suggestion I gave you are easy and just follow it up with a visual on the exhaust. I show where the leaks are possibly going to be on this video ua-cam.com/video/en6eKzyE_80/v-deo.htmlsi=MoBBPl944dp1eHL1
My inspections out, tried the catclean method to no avail.
Am going to try this on my 07 Ford Ranger.
Will report back in a few days.
Did it work
Did it work?
And?
Report?
@SteelToes what happened?
Interesting. My 2015 Jeep Grand Cherokee 3.6L developed a misfire in cylinder one while I was far from home. Drove it several hundred miles back, where I diagnosed a clogged fuel injector. Replaced all fuel injectors, which resolved the misfire, but two days later the dreaded P0420 code appeared.
A bottle of Cataclean failed to resolve the P0420. Was thinking of trying another bottle.
Do you think spraying Seafoam directly into the catalytic converter would be a better way to go?
Honestly since you injector was clogged I can imagine how this would lead to a p420 code unless it was spraying excessive fuel and it heated up the catalytic converters. I will reset and see what happens.
If it pops back up I would spray down the upstream o2 sensor hole. Is your smog test due anytime soon? If not this is going to affect your grand Cherokee! Anything other than a new catalyst is only a temporary solution. They do make direct fit catalyst converters for this 3.6 motor and they run under $200.
@@RANDOMFIX, thanks for your response. I tried resetting the code (erased it), but it came back after two days of driving.
No emissions testing this year. I have time to try different solutions.
Are you saying this is only fixable with a new catalyst? Or do you think spraying the catalyst with Seafoam is worth trying?
@DEValentine it’s worth trying So you can pass and pay thousands of dollars for a part on an old vehicle. It’s only a temporary fix as it will get dirty again and since the vehicle is older it will get dirtier faster.
I would not worry about a p420 code unless I had an emissions test in three months.
I got the P0420 error on my used 2016 CRV in January end. I bought the vehicle last Dec 2022 from auto dealer in Wisconsin and drove all the way back to Minneapolis. The vehicle had clean Carfax which showed regular service changes done as per Honda recommended that I verified as well before buying. The vehicle has 124,000 miles on it. When I got the CEL I took to the local Honda dealer and he charged for check engine light and erased the code via ECM/PCM. The error came back again after 4 weeks and just when I thought of going back to the dealer the code/check engine light itself disappeared for a week but came back again a couple of days back. I took it to the dealer again today and he says technician checked o2 sensor and exhaust leak and they are not a problem. He has given me an estimate now for catalytic converter change and has quoted close to $1700! I do not have the budget now and would like to try this method or May be try any other liquid catalytic cleaner via gas intake. A local mechanic suggested to try erasing the code 3 times before taking any decision spending so much money. I have now erased the code 2 times. What are your thoughts please or what do you suggest on any best liquid cleaner I can try now??? I am planning to do what you have here in the video but would like to confirm before trying the same.
@world peace ☮️
Sorry to hear about catalyst issues, so there are no permanent fixes for this other a new catalyst.
With all of that said I made a whole playlist for just this issue, I think it may be a easier to find you own solution ua-cam.com/play/PLDEbtVOPRC-h1BAzaWQ-6NSnmG0gwvgwP.html and depending on what state you live there are direct connect catalyst for under $150 that I show on the playlist. If you purchase a new catalyst you have a regular muffler shop install it for less than 250. Before you install a new catalyst you need to as yourself what caused this issue? Good luck and keep me in the loop.
@@RANDOMFIX will watch the video one by one when I get some time. Thank you for the reply.
@worldpeace5853 what did you end up doing? I have the same problem with my CRV. I usually just put a bottle of Cataclean in the gas tank and it goes away for several months. Certainly not a permanent solution.
@@louisecoombe I tried the Cataclean but the light went off temporarily but came back again. I got it diagnosed and then changed the catalytic converter but after a month I again got the check emission but this time it is P0139 oxygen sensor thing and NOT P0420. I will need to change the downstream sensor. It is a real pain for sure.
Yes the only permanent solution is a new catalyst but please understand you do don’t need to pay 1700 for a new catalyst because they are direct catalyst for under $200. Check my catalytic converters video playslist.
Here the drive cycle for the honda. ua-cam.com/video/oZELvZ4danA/v-deo.htmlsi=ov_zN-OsPndr-2s7
Can I do this for my 2014 Prius V in California with that code.
The engine experienced missfire of #2.
After that I fixed the engine then that code was on.
You can do this for a Prius but what code are you getting? A misfire code or catalyst code?
Can this method be used for 2013 kia soul? I’ve seen warnings of not putting seafoam directly into the oxygen sensor port. Suggestions please?
Nothing is different on your Kia, you are just bypassing the combustion chamber and the engine completely so the only parts after the exhaust is the catalyst, the muffler, resonator, and the rear oxygen sensor. If you have the money I would recommend buying a new catalyst but for most people including myself a penny saved is better than a penny earned.
Keep me posted and happy holidays
Thanks so much! Happy Holidays!!
Thanks for sharing this,I used the product Cataclean,however the warning light never went off,in your opinion, is this method more efficient when unclogging the converter???
Can you provide a little more detail on what caused the issue and current condition mechanically of the the vehicle? Make mode and miles as well.
@@RANDOMFIX I have a 2011 Nissan Sentra,I had it for about 3 years now. It's a right hand drive,it has high milage, however. One day about a few weeks back,the warning light came on,so I bought a bottle of Cataclean, I followed all the direction, however the warning light is still on.
I will be taking it to a garage very soon.
What code was set for the warning light?
@@RANDOMFIX I truly appreciate your feedback,the code that came up on the reader is P0420
Disconnect the battery. The light will go out. If you fixed it, the light will stay out. Otherwise, it will eventually come back on.
Would you consider this a temporary fix or one that really takes care of it for some time? I don’t have any lights on, nor do I live in a state where there are inspections, but I can smell the cat going bad, and also can tell the lack of power going up hills. Just wondering. Great vid!
It’s only a temporary fix as the only fix is a new catalyst but in some places like California the cats are 1 thousand plus to about 3k. I live in text Texas in a county that doesn’t smog and if I had your issue I could confirm if the catalyst is really bad. Maybe it’s clogged badly?
Then I would hallow it out! This all depends on what your driving, your vehicle might a little louder but it will gain the power if the catalyst is really the problem if clogged. Keep me posted on what you do.
Good job
I appreciate your feedback
Do you have to disconnect the o2 sensor prior to spraying ?
yes, you need access to hole.
Uhhhhh
Can i do this on 2010 dodge caliber
Has p0420 code and need to smog it this month for registration
Hi RandomFix... I have a 2018 F150 with 2.7 Ecoboost and got a P430 code. I did this method and used up only half of the can of seafoam then drove it for over 50 miles. The check engine light did not come off. I also tapped on the Cat with a rubber mallet and did not hear any rattling sound. Should i go back and use the entire can?
Update: So, I did this again two more times. And each time I sprayed the seafoam I would also soak it for an hour before driving on the freeway for about 50 miles then I wait for about a week to do the next treatment. Then before I went to emissions test, I dropped a bottle of the CRC guarantee pass and the code didn't show back up. Its been about a month now and everything seems to be okay. Also my mpg increased from 18 to 21.4!
Using a can of liquid vs spray may not get the sea foam evenly as you can use the plastic tube from the spray type to point the spray to the whole converter rather than just the part by the sensor hole. just my thoughts.
Good feedback and I think that's right.
Does This Works On a 2014 Ford Taurus To Clean The Catalytic Converter
Should I drive it after or smoke out my driveway?
Smoke it out in your driveway, there will be a lot of smoke!!! It could cause an accident if someone is following your too close.
Replace oxygen sensor with dealer oxygen sensor , not aftermarket. Aftermarket often cause poor running. This goes for thermostats & other sensors.
Great feedback. And even pcv valve should be included on this list. I had to find this out the hard way on a 2013 nissan Altima that causes p0102 or 101 dtc. Lots of mechanics had tried replacing the maf sensor but in the engine it was pcv valve. Thanks you sharing.
If you don’t wanna pay dealer prices use Denzel is pretty close to OEM never had an issue
Are use the crows foot style O2 sensor remover. The other ones are junk. I know I do this every single day all they do is spread use the crows foot 02 sensor remover. He will get it out if it seized you replacing it break the porcelain off, heated up and put a shallow six point socket of it and it’ll come right out. There’s seals in the connector joker. and on the tools use a happy inch drive because you’re going to need some leverage at 3/8 drive will not do it so you’ll have to get the reducer and use half-inch extensions three eights for flex all over the place you will not get it. I’ve pulled too many out I know get the adapter half inch to three eights this clown. He doesn’t know what tools he needs.
I’ve had new NAPA O2 sensors be bad out of the box.
Thanks for sharing
mine must be really plugged. I went through the process with a half a can on each side. I can't tell where it did much at all. I'm gonna let it cool and do it again.
And then I might be barking up the wrong tree, but to me it seems like back pressure building. It dies after a couple of minutes. I even thought it could be a plugged fuel line, but it is not the same.
If you thinks it back pressure just remove the downstream o2 sensor from the whole and see what happens.
My 08 tundra cat seems its clogs n rattling.. can it he deleted it ? And does deleting a cat messes up rhe engine ?
Reducing restrictions on the engine such as removing catalytic converters doesn’t not damage the engine however there are laws that prevent you from removing the catalytic converters and these are enforced by smog checks. Good luck 🍀
Leaving the clogged catalytic converters will damage your engine if untreated.
any tips for this on a 2007 saturn aura XR?
Is the catalyst the only unset monitor?
2014 ford focus has p0420 code and i repalced the down stream o2 sensor do i replace upstream sensor and do this seafoam trick?
If you replace both of o2 sensors that you should have a easier time setting the catalyst monitor. Please check for exhaust leaks.
Will this work on a 2016 Chevy Cruze Eco Sedan?
Sure it will work on your Cruze. Just make sure that all the other monitors are set that are need to pass and that there are no pending codes before you try this first as it requires no actual mechanical labor ua-cam.com/video/BuZYAy_xi0E/v-deo.htmlsi=MrrqqUKDQSYbQz1j
Keep me posted and good luck! 🍀
Would this work on a 2010 E350 mercedes?
The 4 dislikes are probably smog shop owners! lol
Thanks for the feedback. Sad to say the smog owners don't even know some of this info as they only think they tell you to do is DRIVE. _Randomfix
Most smog shops don't fix cars so they wouldn't care. Would rather just test a car once and be done with it.
You are right and still the smog shops are not making it easier. I understand they are just enforcing the rules.
@@RANDOMFIX you expect them to break the rules?
Nope just explain it better so people don’t have to drive around endlessly and also if they vehicle will pass with one unset evap monitor they should not refuse to do the test.
will it work on 04 solara se v6?
Ok I have replaced 02 sensors and still getting code grrrrr! So my truck is a 2017 GMC Sierra that GMC had to replace the motor because of the lifter issue . Check engine light came on after I got it back, I think this happened because of the failure on the right side of my engine . Code is for bank 2 cat which is the passenger side cat. It is a new motor so I’m going to try this and see if it works, fingers crossed. I will let you all know if this solves my issue .
Best of luck!
@@RANDOMFIX how long do u think I should let it soak? I did it this evening and it’s been sitting for about an hour. Oh I also added a can to the fuel ! The spray can came with a can to put in the fuel tank .
Will this work on Toyota Prius 2008?
Sure the ideas is the same. Your 2008 Prius is super easy for the catalyst to removed so you might want to uninstall and clean off the vehicle.
Thanks for the information 👍
they never show the comparison of before and after and then driving the 40-60 miles after cleaning the and then erasing the code.... Id like to see them show and prove that spraying seafoam in the cat actually works.
well I can say I did this and it worked for me. I didn't drive 40-60 miles I just started and let it run until most of the seafoam burned off. I then drove it around my neighborhood for maybe at the most 10 minutes. During that time I would see the seafoam still burn off, like when stopped at a stop sign I would see a puff of white smoke and during take off. It then all cleared out. Also I did clear all my codes before I went for test drive.
I tried this two years ago, thinking that spraying directly through A/F sensor was pretty sophisticated, all it did was make a ton of smoke and wipe out the neighbors, but cleaned nothing. I also never use dielectric grease or anti-seize. All not the best ideas.
@@Johnslist
Good luck removing the sensor later. They even send anti-seize with new sensors.
@@robertrose3068 I use the anti-seize that comes with parts, but I don't overuse and get more for everything, like lug nuts, etc. In this case my upstream O2 sensor was for Corolla and it has a flange with two studs/nuts, not threaded into exhaust pipe - so I don't think I used antiseize on those studs.
Sorry for the late reply! did you find a solution?
I wish my O2 sensor is easy as this video, I have a Toyota Prius, the Amazon o2 sensor removal doesn’t fit and I’ve seen some people have to cut the heat shield to able to replace them. It’s a nightmare.
Why not just remove it and clean it? Or you can buy a direct fit for 118 catalytic converter ua-cam.com/video/Wr1vFqCnpDc/v-deo.htmlsi=6aLLk2DUJRGRgD2F and there you will find other ideas as well.
how long did you let the seafoam sit before starting the car?
At least a few hours if possible.
@@RANDOMFIX sounds good, thanks. i'm gonna try this on a 2011 subaru tribeca with 3.6L h6 engine, got a p0420 code on bank 1. swapped both 02 sensors, and air filter, and attempted an exhaust smoke test to see if there was a leak. subaru dealer wants 3k to change out the bank 1 cat. we will report back if this helps us!
Can I do it on my Hyundai accent 2012? P0420 and PO130 code
I would like to try this on my Mercury Mariner. Will it work if the Cat is under the vehicle?
It would be the same process but way look into some way of angling the vehicle up so the fluid does not pour out as you might be using a lot of seafoam. Others have mentioned using a balloon 🎈 on the rear o2 sensor hole.
Will this work for po421
The downstream oxygen sensor code is on. I had it replaced and it’s still on. Mechanic recommended I change the converter(he doesn’t do that so it’s not like he’s trying to make money off me). Might try this.
Would this lower my gas consumption ?
So I have a p0420 code that I’ve been. dealing with , the voltage on the downstream is doing the same as the upstream. I was doing a drive cycle the all monitors set except the evap and the oxygen monitor at first but then as soon as the oxygen monitor set the p0420 code came back I recently changed up the upstream so do you think the downstream is just faulty ?
It could be or maybe a very poor functioning catalyst. I would try catacllean or the duralast catalyst treatment ( cheaper) and see how things go. Really let the vehicle warm up and figure out what is your goal. Is it just to pass this year or fix the problem?
@@RANDOMFIX took it to a repair shop it was a hole in a my flex pipe 🤣
Awesome and thank you for the update about the update.
Late to the show but sometimes O2 sensors (or any aftermarket parts) are bad right out of the box. Make sure your replacement parts are actually working.
By doing this it would it damage my downstream o2sensor ???
Better removed as well ? Any Input I would appreciate it .. thanks
I haven’t had any complaints about this but if you have the access to downstream o2 sensor than remove if it on the lowest part of the exhaust. I don’t think you are putting in that much fluid to fill the cavity. Good luck and keep me posted about your success. If you catalyst is borderline you may get away with some of the other methods I show in the catalyst monitor playlist.
ua-cam.com/play/PLDEbtVOPRC-h1BAzaWQ-6NSnmG0gwvgwP.html
I would try the 3 k trick first as it’s free and no work is really required.
@@RANDOMFIXso i can spray seafoam into both my upstream cat and downstream cat?
I want to try it but I’m concerned that the downstream O2 sensor will get dirty.
Then remove it and place a ballon if you don’t want to seaform the escape if angled.
@@RANDOMFIX Ok. Thank you
@@RANDOMFIXcan you explain a little into more detail about the baloon method im a bit confused, what do i put the baloon over? and do i do this when i start the engine? its safe for the car?
A small vice grip will work to.
What do you use the vice grips for?
A vice grip with a breaker bar on the end will work in a jam. Or even a pipe or basen wrench could also work just don't strip the sensor!
How does this compare to the lacquer thinner in the gas tank treatment?
I appreciate your feedback Sorry for the late reply, did you get this handled?
I got the check engine light Po420 code in my 2010 Ford Focus when I drive 35-50 minutes on the highway it will disappear and come back two days time on the dash but the code is still in the module? What to do
If you vehicle has an inspection due than get it ready by performing a drive cycle but if there is no inspection due then keep on driving as it does not affect the performance. Just make sure you don’t need new spark plugs and that your fuel injectors are not clogged.
@@RANDOMFIX thank you the state I live in DONT do inspection but will check spark plugs
is that the upstream sensor?
Yes pre cat o2 sensor
@@RANDOMFIX great. Thank you!
Is there a fire risk by doing this?
I appreciate your feedback Sorry for the late reply, did you get this handled?
Will this work for a ford f-150 ?
Yes of course
Hey bro I can't pass smoke p420 also my gas keeps on clicking wile I fill up I did replace the evap canister..I ordered the charcoal canister
But I can't pass smoke Chek yet
Any other codes other than the p420?
Replace the evap vent valve that's your problem if you've already replaced the evap canister purge valve. 💯% your problem
Will this work on my 2014 Hyundai Accent Gls
yes, just make sure the catalyst is last unset monitor. Keep me posted
😢 so far I used over half a can and the code popped up again. Gonna take out the downstream one now.
you sprayed seafoam into the downstream cat as well? did this ever work for you?
@@bobz4 put the sea foam on cat one. Only two cats (bank 1 & 2)replace both 2nd bank sensors. Now PO420 & PO430 popped up a month later. All from a bad intake pipe that leaned out the car!
Seafoam is aggressive and necessary used correctly and you will be amazed with the results going to vacuum first second do the gas treatment third to the oil treatment for Fourth sprayed directly into the cat as this video it showed gas mileage performance piece of mine are waiting for you
Chris, Great information. Thank you😁 Can I get your help? CHECK OUT MY OTHER CHANNEL and subscriber if you like it. THANK YOU ▶️ ua-cam.com/channels/-wuhWwzZnFOWK-GMsP6Ejw.html MANY THANKS _Randomfix
Seafoam is definitely not aggressive.
Will this work on my 2009 Honda pilot my check engine light keeps coming on for P0430
Yes this work helpful but lots of people have a hand luck with your civic on on this method ua-cam.com/video/BuZYAy_xi0E/v-deo.htmlsi=Iyphm41KqlSn8cui
I would try the above method first as long as your vehicle doesn’t detect the p430 right away.
Keep me posted on what better for you.
Had the cat fail on our 2001 Nissan after my beloved forgot to put oil in her car. I am wondering of its too far gone since it is now clogged to the level that it is effecting the cars performance. Any thoughts?
If oil wasn't put in the car, I'm afraid the cat is the least of your worries. Your engine is most likely fucked up. At least you can run a car without a cat if you don't live in CA as far as I know
Thankfully we caught it in time. Wishing I had tried this method since when I pulled the cat it was blocked but not broken up. I'm sure this or the the soaking method would have done the trick. 2 bolts broke off and the project is gaining I'm scope. I'm ordering a new cat and going to drill out the bolts.
Is your catalytic converter still clean or has it been replaced after 5 years?
Once the converter ages it requires cleaning more often, so in California that about every two years. And based on your driving habits, freeway vs stop and go traffics. The freeway and high speeds keep the converter cleaner.
Can I use brake cleaner?😊
Brake cleaner is alcohol and might just evaporate?
I am not sure but I would not risk it.
hello sir . how much injection can did you put in that upstream hole before reinstalled 02 back ? thanks for your video
You can do the whole can but it might smoke more when you first start it. I would start with half
@RANDOMFIX would let me know what brand and where are you get it
I went to auto zone today they don't have injection can
Thanks again
Will this work with seafoam in the gas tank ?
You can out seaform in your gas tank but it won’t be as effective.
spray with engine running?
Good question and the answer is no. You want the engine off