p0420 Catalyst System Efficiency Below Threshold
Вставка
- Опубліковано 1 лип 2024
- Hi everyone, Oscar Gomez here from Master Automotive Training! In today's video, I'm going to walk you through the P0420 Catalyst System Efficiency Below Threshold Bank 1 code and how I determined the catalytic converter was faulty using a scanner.
We'll also discuss the P0430 code, which signals a similar issue in Bank 2. I'll share my personal approach to diagnosing these codes, including checking for exhaust leaks, inspecting oxygen sensors, and evaluating the catalytic converter's performance.
Join me as I take you step-by-step through the process, helping you understand the ins and outs of these error codes and what they mean for your vehicle.
🔧 Want to become an expert in automotive diagnostics and repairs? Join our online training community today! Gain access to exclusive content, live Q&A sessions, and connect with fellow car enthusiasts. Click the link in the description to sign up now! 🔧
✅ Our online courses and community: masterautomotivetraining.podi...
✅ Buy your own Topscan Here
t.ly/f68xn
DISCOUNT CODE: FSSY-TPSC-49
✅ Get your FREE Emission's e-book TODAY! ➡️ page.smartautotraining.com/in...
✅ Master Automotive Training ➡️ www.smartautotraining.com
✅ Online Student Store ➡️ masterautomotivetraining.com/
✅ Instagram ➡️ / masterautotraining
✅ Facebook ➡️ / mautotraining
✅ TikTok ➡️ vm.tiktok.com/ZMeatXtNh/ - Авто та транспорт
![ASE Test Prep - [PASS] the L1 Advanced Engine Performance](http://i.ytimg.com/vi/rXjExW8YEJA/mqdefault.jpg)
![OBD2 Scanner Live Data Explained: [Top 3] Data PIDs](http://i.ytimg.com/vi/9YLHaavMDVw/mqdefault.jpg)
Great job! I’m going to steal this explanation for my channel
Go for it! Just pass on some recognition 😉
great explanation! I would also check the spark plugs on wear. I once had a p0420 and did a test on the gas analyzer. It passed the test, so i checked the O2 sensor and noticed sensor 1 (air/fuel) switching alot and also the O2 downstream. I went on and checked spark plugs and they were pretty worn. I changed the spark plugs and did a reset of adaptive values. Since then i always check the spark plugs to be sure the computer is not compensating for worn spark plugs
Thank you Sean, you are correct, its always a good ideas to use a scope or visually inspect the secondary ignition system, to prevent carbon fouled cat.
Great video Oscar! Love your explanation of examining the root cause. Seen many shops load the cannon without any further evaluation. Misfires and fluid consumption are the main killers of catalysts. Also, amazing what's capable with dongle and a phone!
Hey Matt, thank you for your kind words. Sadly to many shops and techs will just throw parts without first analyzing whats the root cause. I highly recommend the topscan, very powerful tool.
For my P0420 tests I also like to compare the reaction time of the upstream 02 against the down stream O2. I mainly work on Toyota and Subarus (which use AFR for the upstream).
90% of P0420 codes (I encounter) are related to a slow reacting upstream O2 and /or bad spark plugs
This taught me a new way of testing cats. Thanks for taking your time for sharing your knowledge with us!
Glad it was helpful! Thanks for watching.
Great informational video. My 2005 Honda Civic has the same code and from your video I realize my CAT may be toast due to a very small head gasket leak that likely caused the CAT to overheat due to the coolant and tripping the code. 🤞that it's the O2 instead.
Nice job Oscar. I was just trying to explain to somebody the other day about this being a pro tool versus a non-tool. This does keep up with even the highest end scanners. You cannot beat this for the money.
Thank you my friend. I always say gear doesn't buy skill lol. Im very impressed with the topscan and I tell everyone its my techs go to tool.
Cool. I had an intermittent P0420, which turned out to be an exhaust leak at the Manifold donut gasket. Worn engine mounts also added to the leak. A new gasket and mounts fixed it (use OEM for these). Downstream O2 sensor was reading lean. Car is a 2006 Matrix 4WD with 225k miles.
Very nice! That's a common issue, great catch. Thanks for sharing this helps other Incase they run into a similar issue.
U did a hell of a job showing how 2 do it if anyone says it was bad they have no idea about cars truck or for that matter any thing They're just r***** thanks again !!
Thank you for watching my brother and dope comment!
I think I got it …it’s little be advanced for me ,,,I gonna study it more ..Thanks again appreciate
You got this! Look it over once again, and test it out!
Great vid man. Just found the channel
Welcome aboard! Thank you for watching.
Good explanation. Keep the videos coming
Thank you for watching more to come!
Yes more technical videos!
This was good. Thanks.
Glad you enjoyed it!
good job man , thanks
Glad it helped, thanks for watching.
Great job man
Thank you for watching.
Great content as usual
Much appreciated,thank you for watching.
good job Oscar!
Thank you for watching!
Very good info my friend!
Glad it was helpful! Thank you for watching.
@MasterAutomotiveTraining
Np and i subscribed to your channel. 😎
Thank you for covering MODE 6. 😤
Hi do you believe in using a digital laser temp gauge the one you point or a infrared camera with temperature readings
It's a good method or even using a thermal imager, you just need to test many known good cars to have an idea of what's good vs. what's bad, to then apply to your diag.
Hey I had a Tahoe with a returning P0420 code, previous techs had replaced cats twice on it, I got it and could not condem the cat, but they wanted me to put another cat on. Code returned. Later found that coolant temp was only getting up to 180F now matter how long it ran. I put in a resister to the coolant temp connector and verified computer could read 200 degrees, it was able to, tested the coolant temp sensor and found according to the temp to resistance chart. Also passed, so I recommend thermostat customer declined and left. My question is, if coolant temp doesn’t not get up to temp how can that effect just one bank and cause the p0420 back? It’s driving me nuts lol
I can't see how a coolant temp issue would cause a single bank issue. was it California emissions, possible that you were using the wrong cat? is it oem cat? I have seen new aftermarket cats set 420 code
@@JOHNPHUFNAGEL yes I checked all of that,it was an aftermarket cat, but the last two were OEM.
It's called time to temperature. On my previous video of the 3 PIDs I speak about it. If the ECT takes too long to warm up the monitor won't run or run at the wrong time causing a false DTC. You can also read that same info in service info it's part of the code setting criteria. Great catch.
@@MasterAutomotiveTraining holy shit must have missed that. I sincerely hate a vehicle leaving that was not properly diagnosed. I NEED it fixed. Thank you.
@@MasterAutomotiveTraining I'm currently using HP Tuners to do the same tests, but the supported vehicles are limited. I did notice on a 2014 Silverado with a 5.3 L83 with a bad thermostat that almost all emissions tests fail to run until the target coolant temperature is reached. I am assuming that most systems are the same. Do you have an affiliate link to the scanner you are using? dragging a laptop out to diagnose is very cumbersome, and a huge pain in my ass.
Oscar Gomez Master Automotive Training
Enjoy your 4th of July with all your family around you
Brilliant video tutorial outstanding
👍
WHIP SMART, Oscar Gomez Master Automotive Training
From Nick Ayivor from London England UK 🇬🇧 ⏰️ 7:04AM Good Morning 🌧 and more 🌧
Thank you my friend! Your support is amazing!
Have you had a new car block you out of the system ? You can pull codes but no live data ,no bidirectional just Codes.
It must have asecure gateway man
Not yet, you'll need to get your scan tool registered with Autoauth and also get your VSP for the new changes.
2005 Toyota Corolla le, brand new 02 sensor upstream and downstream, brand new catalytic converter CARB California, brand new battery, brand new spark plug,anyway, no codes and always not ready the O2 sensor i failed in the smog check. Drive cycle is like 2000 miles now.
Wouldn't negative fuel trims indicate that the car is decelerating, since the pcm is removing fuel instead of adding it?
On decel it goes into OL-Drive and trims aren't being monitored by PCM.
Clicked on the video hoping to get some insight on my wife's 07 Honda Accord, been getting an intermittent po420 for 5 years, the cats aren't cheap for these cars, so I'm glad I didn't break down and get one at the first sign of the po420, car runs great, haven't had any other trouble codes, just don't understand why or how this code pops on for awhile, only to go back off for awhile, if the cat is on its way out, why has it kept doing this for 5 years, I just don't get it
You're suffering from a weak cat. During the entire video I explained how to test it to know if it's the cat or an input sensor. If you follow the same steps you'll be able to determine the true cause. Curious what type of insight did you expect to see?
Hey man, do you have a shop where you do smog diagnosis? I am local to you and i have been playing parts cannon with my 94 jeep 4.0 for 15 years. im about to throw in the towel. Id love to see if you can diagnose.
Of course man, we are Master Auto Care. 9233 Archibald Ave., Rancho Cucamonga, CA 91730. 909-493-1855, give us a call to setup an appointment and we can definitely help you get it fixed.
Data data data 😊
Coming up! 😃
You can run on some toyotas the cat monitor , zero mph
At idle?
Comparing it with Phoenix Max is not correct
All the knowledge in this video yet, you focus on that comparison, well ok. Good to know.
@@MasterAutomotiveTraining😂😂
Bla bla bla for five minutes, and you haven't started explaining the code yet.
Well, I started explaining the proper process at :50, I believe you wanted a video saying replace this part for this code. I'm not a parts changer and don't teach that, since that's what you want, I'm not the channel or teacher for you, best of luck with parts changing.