Toyota po420

Discussion in ' 1st Gen Tundras ' started by danmurphymnOct 25, Log in or Sign up. Toyota Tundra Forum.

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?

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. Toyota catalytic converter is very good in term of lowering emission. I never have any good luck with aftermarket Catalytic converter with modern hybrid toyota. The emision treshold for Toyota hybrid is much lower than regular cars and there is a reason why the original cat is so much more expensive. It is because it contains much higher catalyst quantity and quality. The only way to solve P is installing original catalytic converter. Otherwise, we will waste too much money on garbage aftermarket metal pipes.

Followers 0. No need to touch upstream O2 sensors for a or code.

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.

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. The bank 2 version of this code is P There are rarely drivability issues associated with P

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. This could be attributed to a malfunctioning catalyst or potentially be a false alarm triggered by a defective O2 sensor. The engine control module ECM uses two O2 sensors, one in front, and one behind the catalytic converter to measure its efficiency. If the catalyst system efficiency is low, the P code will be triggered.

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The job of the oxygen sensor after the cat converter is to let you know if the cat is working or not. Thanks for the replies so far. This code has been on for months. You narrow it down by the code being given. Do you think I should try changing the oxygen sensors first? Estima Servicing. Bad spark plugs would give you a misfire code, like P , P, P, etc. After about K miles or so, my cat gave up the ghost. 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. Jack McCarthy likes this. Passenger side is 2. I guess it could be an exhaust manifold leak? For a better experience, please enable JavaScript in your browser before proceeding. So that is why with po which is usually a bad cat converter to confirm it you must use scan tool and graph upstream and downstream oxygen together. They should look after you.

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.

During this time, it's up to the retailer to prove that the fault wasn't there when you bought it - it's not up to you to prove that it was. The O2 sensors are rarely failed and P is Toschi - Amarena Cherries in Syrup, 1kg Bosch Automotive 19A Wiper Blade. This is an older thread, you may not receive a response, and could be reviving an old thread. Go to topic listing. How many miles do you have on your spark plugs? Any help is appreciated! Konrad C Posted December 9, What happens is you have pollutants going into your cat converter.