Lean Code, P0171

[GuyWithMazda]

Hello all, was wondering if anyone here ever had a lean code (P0171) issue. My truck has had it for a couple months and I have thrown many parts at it, but it won't give me a break. Any suggestions?

 

[Colin]

I have thrown many parts at it

What parts?

 

[rusty ol ranger]

Lean codes are usually a result of a vacuum leak.

 

[GuyWithMazda]

I have replaced the IAC, the exhaust manifold gasket, fuel filter, PCM, O2 sensors, temp sensor, previous owner replaced some of the emissions parts, timing belt, and PCV valve. I have taken it to a shop, and they said it has no vacuum leaks. I will be replacing the fuel injectors soon.

 

[Colin]

What brand of o2s? Should be bosch
What brands are the other parts?

 

[White_4x4Ranger]

maybe do a fog test.