Dtc p0420 toyota

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Drives: Yaris XP9 1. So, Since a while we are seeing the check engine light pop up sometimes on our Yaris 1. I saw this for the first time about three months ago. Had some issues with the rear muffler, but that one was replaced for a original one by the dealer. New muffler sits under the car for about a month now, but i saw the P again last week.

Dtc p0420 toyota

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! To get full-access, you need to register for a FREE account. Post Reply. I've been getting a nagging P, catalyst bank 1 below threashhold. Is bank 1 the driver side? I did measure the temp before and after that cat, the temp was NOT higher on the downstream side. It was cooler. I also think my truck smells like gas. I've searched but not found a specific thread for this.

What happens is you have pollutants going into your cat converter. Bank 1 sensor 1 or sensor 2? Find More Posts by ThinkPad.

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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. If the cat is not working and not doing anything to the exhaust, then the 2 sensors will read the same thing — indicating a problem. One thing to note: if the P error code shows up in addition to any other error codes, diagnose those errors first.

Dtc p0420 toyota

This page is meant to help you troubleshoot the Toyota Camry 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.

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Posts: 2, The time now is AM. Do you notice that the truck is a little bit louder, especially around the driver's floorboard? Find More Posts by ThinkPad. Here is the AFRs with engine running. The upstream sensor does not monitor anything the cat is doing. Page 1 of 2. Not sure about the intake manifold gasket because I just got the car 6 mos ago. Mileage see signature icon is also fine. Lisle Stethoscope Kit. At first, I installed one sparkplug defouler and still got the P The P code is just "catalyist system efficiency below threshold bank 1 ".

The P trouble code is a common issue Toyota owners face and can cause frustration and confusion. This code indicates a problem with the catalytic converter system, an essential component of your vehicle's exhaust system. This guide will explain the meaning of the P code and its causes.

At first, I installed one sparkplug defouler and still got the P If it's not , it hasn't been changed and you should change it. Denso Air Filter - Page 1 of 2. This car barely slows down a hill. I've searched but not found a specific thread for this. Yes, my password is: Forgot your password? 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. I also think my truck smells like gas. Have you ever replaced the MAF? Drives: Yaris XP9 1.