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. However, what is the cause of this and how can i solve it more permanently? Is there someone who has dealt with this error before?

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.

Do you think I should try changing the oxygen sensors first? If the exhaust gasses are not scrubbed in the cat enough to change the oxygen and NOx compounds, dtc p0420 toyota, than the readings of the downstream O2 sensor are too similar to the dtc p0420 toyota sensor and the OBD says "your cat is not working" and throws the code. At K miles, my cat is squeaky clean and just isn't working any more.

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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.

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.

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DO NOT, put too much or you'll lock your engine up. I have a toyota yaris, 4 cyl, sedan. Passenger side is 2. The senior tech at work said he never got rid of the code P on any car by replacing the o2 sensors. It's just an example. At around - RPM, where it seems very comfortable, it just sings up long hills without any additional input on the accelerator. A rear O2 sensor replacement at around K got rid of the P for a while. Its the post cat one that is triggering the code. Maybe not. Denso Air Filter - As others have said, swap your drivers and passengers side downstream O2 sensors. When you graph the after cat oxygen sensor if it see pollutants the the sensor when graphed will move up and down. Insert Quotes Quotes Post Reply.

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.

Differential Vent Breather. This was with my wife, two kids in the car and probably 60 - 80 pounds of packages in the hatch. Any feedback based on experience would be greatly appreciated. Kinda close to 2. They are detected by the oxygen sensor before the cat converter. The PO code stopped appearing as soon as the truck was reset. Mark Forums Read. Bank 1 downstream only had 1 of the 2 nuts holding it on. I'm just curious how many o2 sensors does a yaris have? Username or email address: Do you already have an account? Send a private message to komichal. Remember Me? The time now is AM. Send a private message to ThinkPad.