Trouble code po175/po172

[Brien Moore]

The check engine light came on so I went to autozone. The codes they gave me was po172 and po175. They said that the injectors were pluged. I ran two tanks of gas with injector cleaner threw it, and It isn't getting better.



Did they point me in the right direction, or is there something else wrong.



Any help would be great.



Thanks,

Brien

 

[Todd Z]

They are completely wrong, Those codes mean Bank 1 and 2 TOO RICH..... Not lean....

Your truck is getting too much fuel, either due to a leak, bad 02 sensor or something else..

Todd Z

 

[Richard L]

Those are the error codes people get when they have the cracked vacuum hose elbow. Do a search for "Elbow" and you will find a bunch of info here as well as pictures.



...Rich

 

[Brien Moore]

I just checked the elbow, and it is ok. Any other things I should try?

 

[Ron N]

BANK 1 = DTCs P0171 (lean) and P0172 (rich)

BANK 2 = DTCs P0174 (lean) and P0175 (rich)

Check intake air system for leaks, obstructions and damage.

Check air cleaner element, air cleaner housing for blockage.

Verify fuel level.

Verify integrity of the PCV system.

Check for disconnected spark plug wires.

Check for vacuum leaks.

This is out of the manual of things to check,Hope it helps. Ron