So I have a code P1131. Was wondering if anyone has dealt with this before. I can't hear any vacuum leaks and it doesn't run any different.
Its lean bank one I think. Which side is that..


Dick

 

Bump...............................

 

Well when I had that code in my tundra it drove me nuts.in the end when I talked to a Toyota tech I knew it end up being a dirty mass air flow sensor due to me putting in a k&n and sometimes the oil does that.

 

So I'd check that...quick and just 5.95 for a can of cleaner.

 

That would make both banks lean.. I replaced the o2 sensor today I'll see how it does.
Sucker didn't want to come out at all.

Dick

 

If the o2 doesnt do it,make sure to check the rubber elbows on the vaccum lines. These are known for failure in my experience. Since its showing bank1 (pass side), it most likely is the o2. In a few cases I have seen some of these vaccum leaks throw the same codes.

 

Yep I would think it is the 02 sensor I had one that was unplugged when they put on the exhaust and it through this code! Hope it works out.

 

Thanks... I have to check the 12v heater wires to make sure they are working. The orig o2 had 100k on it so I didn't feel bad replacing it...Going to have to take the ypipe off to fix the oil pan so I will take the right sensor out at that time...Only 2 on my truck.

Dick