Toyota po420

By Hshshumen, December 7, in Auris Club.

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.

Toyota po420

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. Do you think I should try changing the oxygen sensors first? Any feedback based on experience would be greatly appreciated. Sort by Oldest first Oldest first Newest first Most reactions. Not sure about the intake manifold gasket because I just got the car 6 mos ago. Are you saying I may need to change it? If it's not , it hasn't been changed and you should change it. It causes a few trouble codes from vacuum leaks The job of the oxygen sensor after the cat converter is to let you know if the cat is working or not.

I understand what you're saying about aftermarket catalytic converters, but I had it tested at my works workshop and it passed, although they did have to get it hot. It will never work either unless we have much older Toyota po420.

Discussion in ' 1st Gen Tundras ' started by danmurphymn , Oct 25, Log in or Sign up. Toyota Tundra Forum. Welcome to Tundras. You are currently viewing as a guest!

This page is meant to help you troubleshoot the Toyota 4Runner 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 vehicle will throw the service engine soon light P This can happen for three reasons:. You can ignore this section if your 4Runner has an inline engine or if the exhaust manifolds merge into one pipe before the catalytic converter. Typically, the first cylinder is closer to the front of the engine.

Toyota po420

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. Drawing on our experience, we acknowledge that resolving P can be challenging without appropriate knowledge. This complexity arises as the error can take a significant amount of time to reappear, even after parts replacement and code resetting. Throughout this blog post, we will address these issues and more, providing you with comprehensive insight into the P code.

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Code po is catalyst inefficiency code. Bank 1 sensor 1 or sensor 2? They are mostly the same. There are too many counterfeit parts floating around ebay , and Amazon. Clear editor. Link to comment Share on other sites More sharing options But, if you can see beyond those! You are currently viewing as a guest! As I understand it, an exhaust leak, particularly near the O2 sensors can cause this type of problem. The upstream sensor does not monitor anything the cat is doing. Once you have engine rebuild or exchanged plus all other parts you already replaced you will enjoy a used car that is like new. I would also check the breather pipe system, and the EGR which I only recently discovered was on this petrol engine. The 1. That quieted things down nicely. Insurance Support.

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

Isn't there an upstream before cat and downstream after cat? Also if anyone knows if there should be done something with the car computer after changing the O2 sensors? Toyota GR Corolla Forum. This code has been on for months. Jack McCarthy , Oct 25, Here's an example: Amazon. Locking wheel nut. Insert image from URL. Join the conversation You can post now and register later. Ask a question Answers will be sent directly to your email. If yes, it seems too spendy, I guess I'd swap the upstream sensors and see if the code follows, just to rule them out. No issues over the last four years and it's passed three smog tests. This one even has a receipt that is serviced around miles ago from Toyota dealer, but when I did the service it turns out that the Air and Cabin Filters where not changed the last time whenever that was.