Great job getting yourself out of a tough situation. This is the main reason I watch your show; the stuff you wont find in a text book or service manual, that you really only learn from experience.
I bought a new Bosch O2 sensor online, got it in the mail, put it in the car, and got the P0141 code. Thanks to this video, I was able to identify and then test it's heater wires resistance vs the original sensor (which worked fine, I just couldn't get it out of the old cat, which was the broken part I was replacing) and saw it wasn't holding a steady ohm reading like the original sensor was. I replaced the Bosch with another new Bosch, tested it before installing, and it was holding a steady resistance. Installed it - no more CEL. Thanks again Eric, you made my day!
Eric, I have a 98 Toyota Corolla and my Downstream sensor has been showing and engine light for about 2 years now. I was told not to worry about it by two different Auto Parts places when they check the code. Recently though a few times I have had trouble when the car was cold the most recent time the car went fine at very slow speed but as soon as you press on the gas it didn't want to go anywhere! It also has a 4-wire harness set up to the oxygen sensor. Now this makes perfect sense to me why the car runs fine when the car is warmed up and I get crappy runs at times when it's cold. It's the internal heater on the O2 sensor that has gone bad! Thank you so much for this video and the explanation. Unfortunately on my car they say you have to pull the seat out in order to change it and hopefully it doesn't break or strip the threads when my mechanic changes it out. Unfortunately this means big bucks for the labor but I cannot do it at myself at this point due to health concerns. Thanks again for letting me know why my sensor went bad this was the best video I have found about this subject period.
Agreed. Especially when you can't see the meter or are focusing on keeping probes on pins. Easy audible confirmation makes for less stress when troubleshooting. Keep up the good work Eric.
I really appreciate the time it is taken you to work on this with the lifting the thing.Most of you fans don't have a lift in there Garage, and all the help channels use one,except Scott.Thank you
Thanks for your informative video. I used your approach successfully on my 1998 RL. A couple of points. Move both the top and bottom of the passenger seat as fa forward as possible. Instead of lowering via hanger knock down, remove the heat shield (looks like about 8 10mm bolts). This allows you much better access to the sensor and prevents damaging the rubber doodads. Finally, be careful with after market O2 sensors. Mine while very cheap at $33,, had slightly different threads which made it almost impossible to install.
Eric, I want to thank you SO much for all the info you've given in this video. I've searched for about half an hour before I saw your video and all I could find out was to test the resistance in the O2 sensor, but they didn't tell me HOW to do it. Not only did you tell us how, but you SHOWED us how. I have an '01 Honda CRV 2.0 liter 4-cyl. with the P0141 code and I will now try to determine (using your tutelage!) whether or not I'll have to replace the sensor or if I have a bigger problem. I also have a misfire in all four cylinders and a random cylinder misfire code P1399, so I'll be looking for more of your videos. Thank you VERY much! Your info and video could not have been better.
I had this same code. I replaced the 02 sensor and reset the check engine light. The code came back immediately. I took the new 02 sensor out and checked the ohm. The brand new Bosch sensor was reading 186.5! I went back to the parts store and swapped it out. I checked the second one at the counter. It read 2.6. Went home and installed the second new one. No issues so far. I waisted several hours looking for a short in my wiring. Tip of the day, check all new sensors before you install them!
This is the part of working on cars I hate the most. A simple repair like an O2 sensor ends up meaning partially dropping the exhaust for the "easy" option. I just changed the water pump on my '04 GMC and was greeted with the P0161 code. I can't imagine how I damaged any wiring replacing the water pump, but at least now I know how to test the sensor. Thank you!
Tip: If anyone is having trouble breaking an O2 sensor loose, this worked for me: Soak it for a couple of days with liquid wrench (penetrating oil). Then, run the engine until at operating temperature. This uses heat from exhaust gases to expand the manifold or exhaust pipe or cat to make it less tight on the sensor's threads.
Eric you are doing an excellent job fixing the car and video. I very much appreciate it, it's very helpful. We need to see more of what you fixing cars. Again thank you very much.
i envy your patience no way i could film and attempt repairs. however i dont do it for a living. im sure id have wiz wheeled the heat shield out of my way nice work
Eric thanks for all the lessons. I have learned so much from you. I recently had this code on my 99 grand am se. I tested the resistance on the 02 sensor and I was getting about 7 ohms on my meter. I tested the 02 sensor and I'm getting 7 ohms resistance. I tested a new sensor and I get 5 ohms. I tested the connector going to the 02 sensor and I get voltage but it was not always present even with car hot and running. is it suppose to always receive voltage once the car is warm?
Worked for me! Even easier to get to on my 2006 accord. Was interesting that mine failed on the coldest day my car's seen in 4 years...wonder if that "helped" it fail at all? Thanks as always!
If you have a sticking o2 sensor, put some brake fluid in a spray bottle, and spray the threads. It works AWESOME !! We do it all the time at work, and it works.
Great video and tutorial, thanks! Had a P0161 code, O2SB2S2 on my 2004 Toyota Highlander 2.4L. Was told a good way to narrow down if only the sensor is bad and not something upstream, I could swap O2 sensors to see if the code would jump to the other bank; luckily on this vehicle it was an easy swap, Swapped sensors, sure enough, the P0161 code went away and got the P0141, O2SB1S2. Now I know for sure the sensor is bad and not something controlling it. A bit unorthodox, but effective. Thx again for your videos.
I had the same code once.. I crawled underneath it and found the O2 sensor (lucky for me I had a service manual or id never known which one). The wiring looked suspect at the connector. I took them out, re-spliced them, reconnected them, cleared the code, all is well. I almost bought a new O2 sensor before this, glad I didn't. Those babies are expensive
If the fuel pressure regulator vacuum diaphragm leaks it will leak raw gasoline into the vacuum line. GM has had a lot of problems with the fuel pressure regulators leaking like this and not setting any codes. Hot engine restarts are a problem though because the raw gasoline through the vacuum line can flood the engine. Scanner Danner did a video dealing with this problem and how to check it out.
When you said that if you can't get the old O2 sensor off, you need to get 'creative', what would you do? Would you weld a nut over a new hole adjacent to the old sensor and install the new sensor beside the old?
'always like your videos. No gloss in your description of the work at hand. Practical answers and analysis of difficult problems (ie corroded exhaust bolts) .........
Hey Eric quick question! 🙋🏻♂️- I have an ‘05 Acura TL and my O2 sensor has 5 pins! Solid blue, solid yellow, solid black, solid, white, and a solid light gray. I think I figured which are power, ground and signal, but my oms reading says 3.5♎️. On my vehicle harness side I am getting 12v power so I known harness is good. I am getting that P0141 and P0161 for bank 1&2. If I get any kinds of resistance from sensor, should I assume is good or is there a range for what would be considered a good and bad sensor? Thanks for all your videos and help!
hey eric!!! You should do a video showing how to replace an intake gasket!!!! Preferably on a pontiac vehicle:) If ya haven't done one already as far as I know! Awesome video!!!!
Replaced both B1S1 and B1S2 sensors with NGK. I read that they are the same brand as the originals (Dodge Dakota). After 200 miles, CEL comes on, indicating P0135 and P0141. Translation: Heater circuit for both O2 sensors. Is this another issue like running Bosch versus factory original sensors in a Chrysler product? I had replaced both sensors due to a P0420 code originally(Catalyst efficiency).
Yes, Normally on older cars when you replaced the O2 sensor you would have noticed a improvement in fuel economy. But something else must be causing your issue. Incorrect tire pressures, brakes that are partly applied, bad airfilter and a few others things.
Hey eric had a question. When u test a 02 sensor, is it suppose to be hot or cold when tested. Also is this the same process for the upstream ans downstream sensor. Let me know
Living with the life with Eric good to thing take us to the little details of your life there you're very artistic Like a Surgeon could have been a doctor
Looks like a really tough job, and tight squeeze- I sure wouldn't want to do that. You'd think they'd design cars to be more mechanically friendly when it comes to repairs !!!
The bad thing that you learn is that when the engine and all that stuff is put together they make it easy on themselves so as to cut costs. That sensor isn't all that bad, they are way more worse things to have to get to to change/diagnose a part(s). Yeah, it sucks, but they aren't going to change. When/if you check into what parts cost and labor cost to do a job you will find that you will save hundreds for not all that much work. The more you do the easier it gets.
HEY ERIC!!! LOVED THE VIDEO!!! PLEASE DO P0420 DIAGNOSIS ASAP!!! ALSO I TRIED THE TWO WRENCH METHOD, I WASN'T SO LUCKY :( IT STRIPPED AND IS STILL STUCK :(
Eric, is the Actron scanner you use in this video a good scanner for the home DIY'er like myself? I have a 2011 Element and would be nice to scan / clear codes. Great how-to as usu.
Hello Eric! Thanks for the awesome video! I have a question about the AFR O2 sensor for Subaru Outback 2.5 2005. Part number for Subaru geniune sensor is 22641AA33A. Question 1: Can it be replaced with a sensor from other manufacturers? Will it affect the car performance ? Which ones would you recommend? Question2: This is an upstream sensor. Can it be replaced with the downstream sensor? What is the difference? The downstream one is significantly cheaper
Thanks for the video! Word to the wise...stop using your " palm" as a mallet. after working on my car all day three fingers swell and feel like fire. I'm nearly 60 and my right hand is becoming very limited. Banging a ratchet now with my hand makes my toes curl! Lots of Advil in your future my friend.
Hi Eric. Thanks for the videos. Is there something about "slow" and "fast" OBD2 scanner? I am using an amateur $30 Autel MaxiScan scanner. I observed the pre-cat O2 sensor cycle from ~ [0.2-0.7] V but in slow pace, about 1 cycle per second regardless at at idle or 2500 rpm. Coolant temp is 190F after a long drive. I saw people 's demo with slow and fast waveforms according to idle and high rpm modes with different scanner.
Eric, I watched this whole video (top-notch, like all your videos), but unfortunately, it didn't address the problem I have, so I was hoping you could help point me in the right direction. I have a 2001 Ford Taurus (3.0 6V) and am getting two rear O2 sensor heated circuit malfunction codes: P0141 and P0161. Recently had to replace the torque converter, so tranny was in/out/in. Shortly thereafter the B1S2 threw the heater malfunction code, so I replaced it with a new one. Two ignition cycles later, the code returned with the B2S2 joining in. Can you give me a methodical process to trace the harness side wiring?
Eric if my post cat sensor runs 100 percent duty cycle all the time except for sometimes when I run the car hard the D.C. Drops occasionally and the heating element is within spec would that mean bad cat? Sometimes I smell sulfur too.
hi eric. thanks for sharing this awesome info. question. on my opel meriva 2007 im getting the same fault code saying o2 sensor faulty. will this o2 sensor cause the car not to start in the mornings when it is cold? it battles only on the first start in the morning once it starts the rest of the day starting it is not as issue. thanks alot
Eric, just FYA , if you want to check high resistance with you multimeter DON'T put it on "continuity test" !!! continuity test if only test short circuit and beep when it reads a curtain low value. if it higher than about 2k it's going to show infinate resistance. so if if you want to check high resistance put you meter on 20Mohm mode.
Sweet! I have a 99 acura rl with this exact code 247k miles. I will be doing this soon. Thanks Eric you really are a life saver! My chilton guide sucks! You rock!
Had some work done recently and my Santa Fe came back with an O2 sensor code. Turned out the tech had plugged in the the sensor upside down. Fortunately it was the easy one you can just reach down and grab at the front. Pays to check the easy stuff first.
Eric I replaced down stream a year and half ago . Same thing again burnt out heater in o2 sensor . I am guessing the cat is going and heater is staying on and burning it out ? 2002 dodge 4.7 Thank you Leo
Blessings I have a question what if I’m not getting any bolts to the connector that’s coming from the car what should I be looking for? Or could you tell me the proper name of that connector
Hey Eric I have a question. I have a 95 chevy lumina v6 3.1. Ive put brand new ignition coils, spark plugs and wires also speed sensor and im still having lack of power. What else could be wrong?
hi Eric, Thanks for the amazing and useful video on replacing Oxygen Sensor. Question for you. I am getting P0136 on my 2000 Toyota Camry V6 3.0 with 180K miles. OBDII shows the code which corresponds to B1S2. I am trying to figure out which sensor is that on the camry. Is that the one at exhaust manifold on engine firewall side? Or, is that the one next to Catalyst Converter? I also wanted to know the Denso part number (CA Emission) that will replace it? Thanks for any info.
Great video, hi I'm having a P0420 code on It is the Catalyst Converter, don't know what to do, I can't find it in California what is the best thing to do Eric?
Eric, We just changed all O2 sensors on my daughters 2003 Ford Escape v6 4x4. Getting the P0141 Bank 1 Sensor 2 (not pending but stored code) and sometimes if you rev engine the temp guage goes up to red/overheat level. Any ideas??
question, with OBD2 and a software in idle there are 2 sensors one is constantly changing value 0.4v to 0.7v like every second and the other stays on 0.4v. is that normal for the first one to change value all the time ?
@EricTheCarGuy I have a 2005 dodge neon that I replaced the downstream o2 sensor on. I had a code p0138 and after I changed it, I now have a code p0141. I don't know what to do, because it's saying the sensor is bad. Do I just need to check voltages running to the sensor?
Eric. 99 Taurus. Got 2 codes at same time. O2 right bank and o2 left bank . Both codes sensor 1. I'm thinking vacuum leak or something else. .?? Idle is low and is rough. Can't find a vacuum leak though. Any info appreciated
Hi Eric, had the P0141 code pop up on my vehicle as well. I checked the resistance of both upstream and downstream sensors and all is well. So if the sensors are working properly and I still get this code, what would be the next thing to troubleshoot? Any information would be much appreciated, thanks!
I was always told that the downstream sensor does not affect fuel trims or mileage and that is Not true! The first purpose of the downstream 02 sensor is to measure cat efficiency. The second function is downstream fuel control. This function adjusts the upstream 02 goal voltage within the range of operation of the upstream sensor. The upstream goal voltage is used to ensure long cat life by allowing the PCM to control the amount of air and fuel that is supplied to the cat. If the downstream 02 sensor switch point is at a low voltage the PCM will adjust the upstream 02 goal voltage to reduce high 02 content by . If the downstream 02 sensor switch points stays high, the upstream 02 sensor goal voltage will change and allow a low 02 content. I had a downstream fixed on rich and the negative fuel trims was 25 percent or more, so yes this definitely effects fuel trim and gas mileage.
+Metal Maniac I can definitely verify your information from personal experience. I was about a year without a down stream O2 sensor - wires got ripped out, huge repair, if you like I made a video on it. I had to go under the dash. I immediately noticed after the installation of the new sensor that fuel trims changed. Small minor differences that were hard to pick up on without having a year of experience watching live data. Initially I lost 2 miles per gallon because the PCM kept running testing to be sure it liked the catalytic converter, which it could finally "see". Now I think my miles per gallon is up, but it takes time to get enough data to be sure.
thank you great video. I just got an 2002 Infiniti G20. this one 12 codes. P0420, MIL ON, MONITRS, 0 Inc, 8 Ready, Misfire, Fuel, Comp, Catlyst, Evap, 02 Snsr, 02 Htr, and EGR.
Hey Eric so I replaced the sensor on bank 2 with the code P0141. “04 Honda CR-V here”only has two sensors!. One of the black wires aren’t working. I check all wires even pulled it from the computer to check the pigtail black wire still dead . I’m getting power from all other wires on the pigtail leading onto the computer any suggestion?!.
I have a 2000 BMW 328i, no check engine light on, but failed smog test today for cat and 02 monitors not being ready. The problem is I have never disconnected the battery, cleared the codes, jumped another vehicle or any thing else that would effect the monitor readiness. And I drive it everyday all over, mimicking many different drive cycles. I was told that a lot of times if the cigarette lighter is not working, the memory could be malfunctioning . Could this be a blown fuse? I'm wondering if this is true and if so do you know of any way to confirm this or any other or things that could be effecting the monitor readiness?
I know that these newfangled, safety-minded, lumpy-running V6 engines have "banks", but what about a nice straight six? If they group the cylinders in threes for the exhaust, would they still refer to that as a "bank"?
Great job getting yourself out of a tough situation. This is the main reason I watch your show; the stuff you wont find in a text book or service manual, that you really only learn from experience.
I bought a new Bosch O2 sensor online, got it in the mail, put it in the car, and got the P0141 code. Thanks to this video, I was able to identify and then test it's heater wires resistance vs the original sensor (which worked fine, I just couldn't get it out of the old cat, which was the broken part I was replacing) and saw it wasn't holding a steady ohm reading like the original sensor was. I replaced the Bosch with another new Bosch, tested it before installing, and it was holding a steady resistance. Installed it - no more CEL. Thanks again Eric, you made my day!
Brian can u help
Me to whre is located that sensor on my 97 Nissan maxima gxe .thanks
Eric, I have a 98 Toyota Corolla and my Downstream sensor has been showing and engine light for about 2 years now. I was told not to worry about it by two different Auto Parts places when they check the code. Recently though a few times I have had trouble when the car was cold the most recent time the car went fine at very slow speed but as soon as you press on the gas it didn't want to go anywhere! It also has a 4-wire harness set up to the oxygen sensor. Now this makes perfect sense to me why the car runs fine when the car is warmed up and I get crappy runs at times when it's cold. It's the internal heater on the O2 sensor that has gone bad!
Thank you so much for this video and the explanation. Unfortunately on my car they say you have to pull the seat out in order to change it and hopefully it doesn't break or strip the threads when my mechanic changes it out. Unfortunately this means big bucks for the labor but I cannot do it at myself at this point due to health concerns. Thanks again for letting me know why my sensor went bad this was the best video I have found about this subject period.
Agreed. Especially when you can't see the meter or are focusing on keeping probes on pins. Easy audible confirmation makes for less stress when troubleshooting. Keep up the good work Eric.
I really appreciate the time it is taken you to work on this with the lifting the thing.Most of you fans don't have a lift in there Garage, and all the help channels use one,except Scott.Thank you
Thanks for your informative video. I used your approach successfully on my 1998 RL. A couple of points. Move both the top and bottom of the passenger seat as fa forward as possible. Instead of lowering via hanger knock down, remove the heat shield (looks like about 8 10mm bolts). This allows you much better access to the sensor and prevents damaging the rubber doodads. Finally, be careful with after market O2 sensors. Mine while very cheap at $33,, had slightly different threads which made it almost impossible to install.
Eric, I want to thank you SO much for all the info you've given in this video. I've searched for about half an hour before I saw your video and all I could find out was to test the resistance in the O2 sensor, but they didn't tell me HOW to do it. Not only did you tell us how, but you SHOWED us how. I have an '01 Honda CRV 2.0 liter 4-cyl. with the P0141 code and I will now try to determine (using your tutelage!) whether or not I'll have to replace the sensor or if I have a bigger problem. I also have a misfire in all four cylinders and a random cylinder misfire code P1399, so I'll be looking for more of your videos. Thank you VERY much! Your info and video could not have been better.
Eric you are the man! I love that your videos are clear, well edited, funny, and plentiful. I have learned a ton! Thanks so much!!
Eric, you've helped me time and time again. Thanks so much for your time and efforts.
I had this same code. I replaced the 02 sensor and reset the check engine light. The code came back immediately. I took the new 02 sensor out and checked the ohm. The brand new Bosch sensor was reading 186.5! I went back to the parts store and swapped it out. I checked the second one at the counter. It read 2.6. Went home and installed the second new one. No issues so far. I waisted several hours looking for a short in my wiring. Tip of the day, check all new sensors before you install them!
This is the part of working on cars I hate the most. A simple repair like an O2 sensor ends up meaning partially dropping the exhaust for the "easy" option.
I just changed the water pump on my '04 GMC and was greeted with the P0161 code. I can't imagine how I damaged any wiring replacing the water pump, but at least now I know how to test the sensor. Thank you!
vraiement vous etes un artiste et non un etectromecanicien un grand merci a vous eric
Guerd Mustapha
english please!
Tip: If anyone is having trouble breaking an O2 sensor loose, this worked for me: Soak it for a couple of days with liquid wrench (penetrating oil). Then, run the engine until at operating temperature. This uses heat from exhaust gases to expand the manifold or exhaust pipe or cat to make it less tight on the sensor's threads.
Eric you are doing an excellent job fixing the car and video. I very much appreciate it, it's very helpful. We need to see more of what you fixing cars. Again thank you very much.
i envy your patience no way i could film and attempt repairs. however i dont do it for a living. im sure id have wiz wheeled the heat shield out of my way
nice work
Dude if the resistance I should see is below 100ohms what's the difference?
Eric thanks for all the lessons. I have learned so much from you. I recently had this code on my 99 grand am se. I tested the resistance on the 02 sensor and I was getting about 7 ohms on my meter. I tested the 02 sensor and I'm getting 7 ohms resistance. I tested a new sensor and I get 5 ohms. I tested the connector going to the 02 sensor and I get voltage but it was not always present even with car hot and running. is it suppose to always receive voltage once the car is warm?
Big job for a small sucker !
I liked your "try to remain calm" !! :)
working under a car without a lift SUCKS !!!
There are always unexpected problems when fixing cars. I liked how he showed how to work around them.
exactly why im here
Thank you Eric for step-by-step process explanation. Helps a lot. Thank you Sir, keep going with your vids.
Worked for me! Even easier to get to on my 2006 accord. Was interesting that mine failed on the coldest day my car's seen in 4 years...wonder if that "helped" it fail at all? Thanks as always!
If you have a sticking o2 sensor, put some brake fluid in a spray bottle, and spray the threads. It works AWESOME !! We do it all the time at work, and it works.
Eric, The ohm meter trick works to test electric water heater elements too.
6 year old video and its exactly what I needed almost exact same car thanks
Great video and tutorial, thanks!
Had a P0161 code, O2SB2S2 on my 2004 Toyota Highlander 2.4L. Was told a good way to narrow down if only the sensor is bad and not something upstream, I could swap O2 sensors to see if the code would jump to the other bank; luckily on this vehicle it was an easy swap, Swapped sensors, sure enough, the P0161 code went away and got the P0141, O2SB1S2. Now I know for sure the sensor is bad and not something controlling it.
A bit unorthodox, but effective. Thx again for your videos.
Great video, thanks for the info, helped me a lot to understand P0141 in my car.
I had the same code once.. I crawled underneath it and found the O2 sensor (lucky for me I had a service manual or id never known which one). The wiring looked suspect at the connector. I took them out, re-spliced them, reconnected them, cleared the code, all is well. I almost bought a new O2 sensor before this, glad I didn't. Those babies are expensive
Enjoy this real world style of approach of working on cars. Nothing on an exhaust is ever easy.
Actually Eric your way is correct! The closer the scale to the desired value the more accurate the reading!
If the fuel pressure regulator vacuum diaphragm leaks it will leak raw gasoline into the vacuum line. GM has had a lot of problems with the fuel pressure regulators leaking like this and not setting any codes. Hot engine restarts are a problem though because the raw gasoline through the vacuum line can flood the engine. Scanner Danner did a video dealing with this problem and how to check it out.
I've been doing that wrench trick for years. Works great most of the time, even on strut bolts.
When you said that if you can't get the old O2 sensor off, you need to get 'creative', what would you do? Would you weld a nut over a new hole adjacent to the old sensor and install the new sensor beside the old?
'always like your videos. No gloss in your description of the work at hand. Practical answers and analysis of difficult problems (ie corroded exhaust bolts) .........
thanks, Mr the Car Guy - always good and helpful stuff!
Hey Eric so does this apply to a 2005 4 cyl accord?
thank you Eric for every job welll done always to help us and teach us God bless you men i learn a lot from you have a good day bro
Eric, you are an awesome mechanic. I wish you lived in my town.
Hey Eric quick question! 🙋🏻♂️- I have an ‘05 Acura TL and my O2 sensor has 5 pins! Solid blue, solid yellow, solid black, solid, white, and a solid light gray. I think I figured which are power, ground and signal, but my oms reading says 3.5♎️. On my vehicle harness side I am getting 12v power so I known harness is good. I am getting that P0141 and P0161 for bank 1&2. If I get any kinds of resistance from sensor, should I assume is good or is there a range for what would be considered a good and bad sensor? Thanks for all your videos and help!
hey eric!!! You should do a video showing how to replace an intake gasket!!!! Preferably on a pontiac vehicle:) If ya haven't done one already as far as I know! Awesome video!!!!
Replaced both B1S1 and B1S2 sensors with NGK. I read that they are the same brand as the originals (Dodge Dakota). After 200 miles, CEL comes on, indicating P0135 and P0141. Translation: Heater circuit for both O2 sensors. Is this another issue like running Bosch versus factory original sensors in a Chrysler product? I had replaced both sensors due to a P0420 code originally(Catalyst efficiency).
The info was superb. Thanks Eric. Your video's really helped me on my Honda Accord V6...
Yes,
Normally on older cars when you replaced the O2 sensor you would have noticed a improvement in fuel economy.
But something else must be causing your issue.
Incorrect tire pressures, brakes that are partly applied, bad airfilter and a few others things.
Thank you! This helped me a lot. It's nice to be able to test the O2 sensors to determine which are bad before replacing.
Hey eric had a question. When u test a 02 sensor, is it suppose to be hot or cold when tested. Also is this the same process for the upstream ans downstream sensor. Let me know
Living with the life with Eric good to thing take us to the little details of your life there you're very artistic Like a Surgeon could have been a doctor
Looks like a really tough job, and tight squeeze- I sure wouldn't want to
do that. You'd think they'd design cars to be more mechanically friendly
when it comes to repairs !!!
The bad thing that you learn is that when the engine and all that stuff is put together they make it easy on themselves so as to cut costs. That sensor isn't all that bad, they are way more worse things to have to get to to change/diagnose a part(s). Yeah, it sucks, but they aren't going to change. When/if you check into what parts cost and labor cost to do a job you will find that you will save hundreds for not all that much work. The more you do the easier it gets.
HEY ERIC!!! LOVED THE VIDEO!!! PLEASE DO P0420 DIAGNOSIS ASAP!!! ALSO I TRIED THE TWO WRENCH METHOD, I WASN'T SO LUCKY :( IT STRIPPED AND IS STILL STUCK :(
Eric you do know that if you run the car for 5-15min before you try to pull the O2 sensor it makes it easier to break loose right?
Great video. Would a downstream 0/2 sensor cause a misfire also on a toyota 3rd gen 4 runner. Thanks
P0300 Random Misfire Detected
P0141 02 Heater Circut ( Bank1, Sensor 2) can it be your catalic converter
Great info. And entertaining to boot! Thanks Eric.
Eric, is the Actron scanner you use in this video a good scanner for the home DIY'er like myself? I have a 2011 Element and would be nice to scan / clear codes. Great how-to as usu.
I am sure by now you upgraded your code reader. But how did that actron code reader do for you ? how long did you use it ? do you still do ?
Hello Eric! Thanks for the awesome video! I have a question about the AFR O2 sensor for Subaru Outback 2.5 2005. Part number for Subaru geniune sensor is 22641AA33A. Question 1: Can it be replaced with a sensor from other manufacturers? Will it affect the car performance ? Which ones would you recommend?
Question2: This is an upstream sensor. Can it be replaced with the downstream sensor? What is the difference? The downstream one is significantly cheaper
Some of the KIA mini vans have the OBD II ports both under the hood and dash which is nice
Your AMAZING my dude, Keep these videos ALWAYS coming.
Hope to see some work on 02-05 Jeep Liberty's in the future.
Thanks for the video! Word to the wise...stop using your " palm" as a mallet. after working on my car all day three fingers swell and feel like fire. I'm nearly 60 and my right hand is becoming very limited. Banging a ratchet now with my hand makes my toes curl! Lots of Advil in your future my friend.
I'm 32 and still get happy when I get ahold on one, it's like being a kid all over again.
Hi Eric. Thanks for the videos. Is there something about "slow" and "fast" OBD2 scanner? I am using an amateur $30 Autel MaxiScan scanner. I observed the pre-cat O2 sensor cycle from ~ [0.2-0.7] V but in slow pace, about 1 cycle per second regardless at at idle or 2500 rpm. Coolant temp is 190F after a long drive. I saw people 's demo with slow and fast waveforms according to idle and high rpm modes with different scanner.
Great and useful videos as always!! Thank you Eric!!
Eric, I watched this whole video (top-notch, like all your videos), but unfortunately, it didn't address the problem I have, so I was hoping you could help point me in the right direction. I have a 2001 Ford Taurus (3.0 6V) and am getting two rear O2 sensor heated circuit malfunction codes: P0141 and P0161. Recently had to replace the torque converter, so tranny was in/out/in. Shortly thereafter the B1S2 threw the heater malfunction code, so I replaced it with a new one. Two ignition cycles later, the code returned with the B2S2 joining in. Can you give me a methodical process to trace the harness side wiring?
Eric if my post cat sensor runs 100 percent duty cycle all the time except for sometimes when I run the car hard the D.C. Drops occasionally and the heating element is within spec would that mean bad cat? Sometimes I smell sulfur too.
hi eric. thanks for sharing this awesome info. question. on my opel meriva 2007 im getting the same fault code saying o2 sensor faulty. will this o2 sensor cause the car not to start in the mornings when it is cold? it battles only on the first start in the morning once it starts the rest of the day starting it is not as issue. thanks alot
Eric, just FYA , if you want to check high resistance with you multimeter DON'T put it on "continuity test" !!! continuity test if only test short circuit and beep when it reads a curtain low value. if it higher than about 2k it's going to show infinate resistance. so if if you want to check high resistance put you meter on 20Mohm mode.
To remove an o2 sensor w/o damaging the thread is always good to have a little bit of lubricant mainly brake fluid. It'll come out easily.
Thank you 🙏
But the way, I decide to change the oxygen sensor anyway. 10 min. later, the engine light shows up again code P0141. Any idea?
same here
REDDOT2000 Check the connections. That includes fuses. It could be a blown fuse
UR VIDOES ARE THE BEST! SO MUCH IN DEPTH THANKS A LOT
Sweet! I have a 99 acura rl with this exact code 247k miles. I will be doing this soon. Thanks Eric you really are a life saver! My chilton guide sucks! You rock!
Say Eric shouldn't the upstream sensors be replaced when you replace downstream sensors to prevent false cat failure codes?
How did you get the underside of the car so clean before you started working on it? Awsome vid, give us more of the same.
Adam Pierce probably was a dry summer and the car went through a carwash earlier
Had some work done recently and my Santa Fe came back with an O2 sensor code. Turned out the tech had plugged in the the sensor upside down. Fortunately it was the easy one you can just reach down and grab at the front. Pays to check the easy stuff first.
Eric I replaced down stream a year and half ago . Same thing again burnt out heater in o2 sensor . I am guessing the cat is going and heater is staying on and burning it out ? 2002 dodge 4.7 Thank you Leo
Blessings I have a question what if I’m not getting any bolts to the connector that’s coming from the car what should I be looking for? Or could you tell me the proper name of that connector
Hey Eric I have a question. I have a 95 chevy lumina v6 3.1. Ive put brand new ignition coils, spark plugs and wires also speed sensor and im still having lack of power. What else could be wrong?
hi Eric, Thanks for the amazing and useful video on replacing Oxygen Sensor. Question for you. I am getting P0136 on my 2000 Toyota Camry V6 3.0 with 180K miles. OBDII shows the code which corresponds to B1S2. I am trying to figure out which sensor is that on the camry. Is that the one at exhaust manifold on engine firewall side? Or, is that the one next to Catalyst Converter? I also wanted to know the Denso part number (CA Emission) that will replace it? Thanks for any info.
Bank one sensor 2
Great video, hi I'm having a P0420 code on It is the Catalyst Converter, don't know what to do, I can't find it in California what is the best thing to do Eric?
Eric, We just changed all O2 sensors on my daughters 2003 Ford Escape v6 4x4. Getting the P0141 Bank 1 Sensor 2 (not pending but stored code) and sometimes if you rev engine the temp guage goes up to red/overheat level. Any ideas??
can the sensors be interchangeable if it's the same bank with the same type of plug? Like using a sensor 1 on the sensor 2?
question, with OBD2 and a software in idle there are 2 sensors one is constantly changing value 0.4v to 0.7v like every second and the other stays on 0.4v. is that normal for the first one to change value all the time ?
Eric what about the same code on number 1 but the damn thing is brand new an the old and new test out fine?
@EricTheCarGuy I have a 2005 dodge neon that I replaced the downstream o2 sensor on. I had a code p0138 and after I changed it, I now have a code p0141. I don't know what to do, because it's saying the sensor is bad. Do I just need to check voltages running to the sensor?
airwick what is the resistance on a good sensor?
Eric. 99 Taurus. Got 2 codes at same time. O2 right bank and o2 left bank . Both codes sensor 1. I'm thinking vacuum leak or something else. .?? Idle is low and is rough. Can't find a vacuum leak though. Any info appreciated
Oldcoinsandstuff1
If I not wrong bank 1, bank 2 is just when you re dealing with an V6 or an v8.
Hi Eric, had the P0141 code pop up on my vehicle as well. I checked the resistance of both upstream and downstream sensors and all is well. So if the sensors are working properly and I still get this code, what would be the next thing to troubleshoot? Any information would be much appreciated, thanks!
What length is that O2 sensor for the downstream on the RL
It seems like in every EricTheCarGuy video there is at least one Honda that zooms by your shop.
when are we gonna get the oddessy transmission rebuild videos?
I was always told that the downstream sensor does not affect fuel trims or mileage and that is Not true! The first purpose of the downstream 02 sensor is to measure cat efficiency. The second function is downstream fuel control. This function adjusts the upstream 02 goal voltage within the range of operation of the upstream sensor. The upstream goal voltage is used to ensure long cat life by allowing the PCM to control the amount of air and fuel that is supplied to the cat. If the downstream 02 sensor switch point is at a low voltage the PCM will adjust the upstream 02 goal voltage to reduce high 02 content by . If the downstream 02 sensor switch points stays high, the upstream 02 sensor goal voltage will change and allow a low 02 content. I had a downstream fixed on rich and the negative fuel trims was 25 percent or more, so yes this definitely effects fuel trim and gas mileage.
+Metal Maniac I can definitely verify your information from personal experience. I was about a year without a down stream O2 sensor - wires got ripped out, huge repair, if you like I made a video on it. I had to go under the dash.
I immediately noticed after the installation of the new sensor that fuel trims changed. Small minor differences that were hard to pick up on without having a year of experience watching live data.
Initially I lost 2 miles per gallon because the PCM kept running testing to be sure it liked the catalytic converter, which it could finally "see". Now I think my miles per gallon is up, but it takes time to get enough data to be sure.
Glad I watched it all. Thank you very much!
thank you great video. I just got an 2002 Infiniti G20. this one 12 codes.
P0420, MIL ON, MONITRS, 0 Inc, 8 Ready, Misfire, Fuel, Comp, Catlyst, Evap, 02 Snsr, 02 Htr, and EGR.
If you were to do this today, I have one thing for you, Ratcheting wrenches :-) Good stuff Eric..
Can the Small basic scanner work just as well ? To erase the code
Hey Eric so I replaced the sensor on bank 2 with the code P0141. “04 Honda CR-V here”only has two sensors!. One of the black wires aren’t working. I check all wires even pulled it from the computer to check the pigtail black wire still dead . I’m getting power from all other wires on the pigtail leading onto the computer any suggestion?!.
I have a 2000 BMW 328i, no check engine light on, but failed smog test today for cat and 02 monitors not being ready. The problem is I have never disconnected the battery, cleared the codes, jumped another vehicle or any thing else that would effect the monitor readiness. And I drive it everyday all over, mimicking many different drive cycles. I was told that a lot of times if the cigarette lighter is not working, the memory could be malfunctioning . Could this be a blown fuse? I'm wondering if this is true and if so do you know of any way to confirm this or any other or things that could be effecting the monitor readiness?
QUICK QUESTION, could no catalytic converter and sensors cause misfires??
How did you where the terminals are in the plug?
2002 Lexus 430sc,engine lite on,and codes are 440,441,and446,help needed,what might be the problem?
I know that these newfangled, safety-minded, lumpy-running V6 engines have "banks", but what about a nice straight six? If they group the cylinders in threes for the exhaust, would they still refer to that as a "bank"?