Toyota po420

Discussion in ' 1st Gen Tundras ' started by danmurphymnOct 25,

Log in. Sign up. JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding. This code has been on for months. Tried lacquer thinner, Cataclean, Lucas, etc - sometimes the light goes out for a day, but inevitably comes right back on.

Toyota po420

By Hshshumen, December 7, in Auris Club. I just bought Toyota Auris 1,3 Petrol for my wife, but it turns out that the car has some problems. My mechanic said it should be one of the O2 sensors and most probably the one after the Catalyc Converter. I bought that sensor from Toyota and he changed it, but after around 40 miles the check engine light was on again. After that I bought the O2 sensor again from Toyota and the same thing happen. After miles the check engine light was on again. The second problem is that the car is consuming a lot of engine oil and there is no leakage, no smoke from the exhaust and the car is running perfect. First I put 0W20 as recommended from Toyota and now I changed it again with 5w30 to check if there will be any difference. So if anyone can help with the Check Engine problem or the Oil consumption problem I will be really thankfull. Also if anyone knows if there should be done something with the car computer after changing the O2 sensors? How much oil does it use? I'm wondering if the engine burning oil is contaminating the catalyst and preventing it from working, leading to the fault code?

P is the OBD telling you specifically that the O2 sensor downstream of the cat is sending a signal outside the allowed parameters, toyota po420.

Hi all, previous owner had a decat pipe on my corolla tsport which I've just replaced because I didn't want the hassle of emissions failure come MOT time. I replaced with a whole new Klarius mid section, which includes the catalytic converter and center silencer. I also replaced both o2 sensors with Denso items. My code reader shows P again. I work for a fire and rescue authority and we have a workshop with emissions tester so just yesterday I asked if they could test it for me to make sure it was all working as it should. They had to get the cat hot, but it went through and would've passed an MOT. Then I get this code again today and I'm now stumped.

Are you getting the dreaded P error code from your Toyota Corolla? This post discusses the reasons for the code, and the easiest way to fix this common problem. When you buy through links on our site, we may earn an affiliate commission — at no cost to you. Use an ODB2 check engine light reader to read the error codes that are causing your check engine light CEL to illuminate. Error codes that start with P, refer to a problem with the catalytic converter cat. The way the vehicle determines that the catalytic converter is working okay is by measuring the oxygen content of the exhaust both upstream and downstream of the catalytic converter. If the cat is working, the 2 readings should be different.

Toyota po420

This page is meant to help you troubleshoot the Toyota Tacoma P trouble code. A failing oxygen sensor or bad catalytic converter are the most common causes of P Catalyst system efficiency is the percentage of these chemicals removed from the exhaust system. Oxygen sensors measure these pollutants. When the readings from the upstream and downstream oxygen sensors show similar readings not enough pollutants expelled from the exhaust , your truck will throw the service engine soon light P This can happen for three reasons:.

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Just shine a light in there and you'll see if the mesh media honeycomb is plugged, clean, or disintegrating. The first O2 sensor is used to adjust fuel mixtures, the second is used to test for catalyst function by looking for a phase-shift in the oscillating mixture adjustment, that the car is endlessly performing after warm-up. I used a boroscope camera through the rear O2 sensor bung to view the back of the mesh media. The bank is defined by the 1st cylinder number at the front of the block. If the code follows to bank 2, I'd replace both of the O2 sensors on the now-faulty side. The second problem is that the car is consuming a lot of engine oil and there is no leakage, no smoke from the exhaust and the car is running perfect. Code po is catalyst inefficiency code. Lisle Stethoscope Kit. This code P is caused by an inefficient cat, faulty O2 sensors rear sensor in my case exhaust leak, not updated ECM calibration, etc. They look the same to me, one has a longer pigtail. When you graph the after cat oxygen sensor if it see pollutants the the sensor when graphed will move up and down. AVS Forum.

P is a well-recognized error code within the automotive industry, notorious for its persistence. Luckily, this article is designed to guide you through understanding the implications of this error code, exploring its possible causes, and navigating potential fixes.

It shows how to test the upstream sensor 1 and the downstream sensor 2. Has any of the previous owners maintained the service history or ignored regular oil changes and other items? I highly recommend to you to call the dealer and ask for solution, ask them to repair or exchange the engine, they are obligated to do so free of charge. If bought within the last six months, go back to the dealer and request they repair the vehicle under The Consumer Rights Act Under the Consumer Rights Act - "If you discover the fault within the first six months of having the product, it is presumed to have been there since the time you took ownership of it - unless the retailer can prove otherwise. Posted December 8, Also if anyone knows if there should be done something with the car computer after changing the O2 sensors? Maybe I'll replace the cat some day. This site contains affiliate links for which the site may be compensated. Link to comment Share on other sites More sharing options That quieted things down nicely. Ask a question Answers will be sent directly to your email. It shows " currently in stock ".