P0420 toyota 4runner

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Log in. Sign up. JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding. I have had other error codes. Car: 4Runner V6 Took car to pep boys. They said bad catalytic converter.

P0420 toyota 4runner

Log in. Sign up. JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding. Getting code P bank 1 on Cali 4Runner Limited. Is it oxygen sensor or catelytic converter? The total vehicle value is almost the cost to replace the catelytic converter. I can afford a oxygen sensor. How can I find out??? Sort by Oldest first Oldest first Newest first Most reactions. I think the p is usually the rear O2 sensor but could be either one. If they haven't been changed in a while you might as well do both. Be sure to get Denso sensors, not Bosch.

Have you tried just taking the O2 sensors out and taking a look if they're still good?

Discussion in ' 3rd Gen 4Runners ' started by obx4runner , Dec 31, Log in or Sign up. Toyota 4Runner Forum [4Runners. Welcome to 4Runners. You are currently viewing as a guest! To get full-access, you need to register for a FREE account.

Remember Me? Site Navigation. Member's Picture Albums. I know there have been countless threads on this error code, but since I got my 4runner down to Florida it has been popping codes. I have had it cleared a few times, no big deal.

P0420 toyota 4runner

Remember Me? Site Navigation. Member's Picture Albums. Check Engine Light intermittently comes on and off, for almost a year. Done the following: 1. Replaced Bank 1 Exhaust Catalytic converter manifold.

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The time now is AM. For a better experience, please enable JavaScript in your browser before proceeding. Mark Forums Read. I just replaced the plug wires tonight and diconected the battery. Then it was maybe dirty throttle body. Sort by Oldest first Oldest first Newest first Most reactions. Toyota Land Cruiser. I have a brand new Catalytic converter, not a weld in one but the whole unit is new. I almost forgot. They had a recall on my cat Originally Posted by Robb Do aftermarket cats create a problem? Made it through inspection last year by unplugging the battery and it came on a week later--Went in for inspection this past week and expected I'd have to get a new cat but the mechanic found a small exhaust leak near the cat. The dealer was the only one who could sell me the right one. P is a code for the Bank 1 Catalytic Converter output.

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.

I dont think it's the fuel. I only know as much as I've experienced and the two times I've replaced cats on a car was when there was a smell of rotten eggs or a rattle and with the rattle--sometimes chunks of the innards would clog up the pipe and cause drastic power loss. Post Reply. Do you have a rotten egg smell or a cat that is rattling? Toyota Fuel Tank Cap - Energy Suspension 9. I had them Replace 1 out of 4 of those. Find More Posts by Robb If the fluctuation in the rear O2 sensor which is now mounted in front, continues to persist, I'd gather that sensor is no good. Made it through inspection last year by unplugging the battery and it came on a week later--Went in for inspection this past week and expected I'd have to get a new cat but the mechanic found a small exhaust leak near the cat. What all have you tried??? Welcome to 4Runners. The time now is AM.