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Discussion Starter · #1 ·

I have code "P1135 01 01" coming up on my 6 cylinder 2001 4 Runner. I did a search and see reference to a sensor in other threads but I am confused about a few things.

I see the sensor referred to as the air fuel sensor. Is that the correct name or is there another name I will have to use if I order one?

Where will I find the sensor? Is it under the hood or in front of the cat?

Am I correct that "01 01" refers to the location? Which side of the engine is "01"?

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