Cel p0171

[Steve_rueda]

Hey guys,
I just installed a oil catch can yesterday. And while driving home this afternoon the cel come up on my truck. Maybe an air leak somewhere? I know the code means system too lean bank 1. Any help would be great thanks guys

 

[Brilliant]

Dirty maf

 

[tyr0981]

My P0171

My troubleshooting took some time to track down as well... found, fixed, never returned.

 

[Steve_rueda]

Thanks guys, gonna take care of that this morning.

 

[Steve_rueda]

Still same issue after cleaning maf and tightening down all hoses to and from the oil catch can.

 

[the great him]

I know this is an old thread, but remove that catch can, and your issue will go away. The computer is sensing that and throwing the code. I did the same thing on my 4.7

 

[soupkitchen]

why catch can? Are you having blow-by or something?? Just curious.