check engine 171/172

[DJSKJ]

Check engine light came on and I ran the codes: 171 and 172. General info is 02 sensor, fuel filter,... Kind of non specific. Has anyone seen these codes and know of the potential fix? I know it is situation dependent, but I thought this might be a common problem.
Also, it has been raining here lately. Moisture issue?
I am going to run some fuel treatment through as my initial trouble shooting.

DJ

 

[tjkj2002]

Are you sure on those code #'s? It would have to be a super freak accident to get both P0171 ans P0172 codes at the same time.

P0171-system too lean bank 1
P0172-system too rich bank 1

You sure it's not P0171 and P0174?--system to lean bank 1 and bank 2

Those codes are pre-upstream O2 sensors,most likely a vacuum leak of some sort or leaking/cracked exhuast manifold.But the pair(P0171/P0174) codes are the most hated codes by techs,very hard to trackdown in most cases.

 

[Vranes17]

Are you sure on those code #'s? It would have to be a super freak accident to get both P0171 ans P0172 codes at the same time.

P0171-system too lean bank 1
P0172-system too rich bank 1

You sure it's not P0171 and P0174?--system to lean bank 1 and bank 2

Those codes are pre-upstream O2 sensors,most likely a vacuum leak of some sort or leaking/cracked exhuast manifold.But the pair(P0171/P0174) codes are the most hated codes by techs,very hard to trackdown in most cases.

man you simply amaze me with your bank of knowledge TJ, its just remarkable

 

[Dave]

man you simply amaze me with your bank of knowledge TJ, its just remarkable

tjkj is a professional maniac...errr I mean mechanic........:smokin:

Dave

 

[DJSKJ]

Yes, those are the codes. I know they are contradictory. I ran it twice: checked the first time and said WTF so I reset and went out drove, light came on and I checked again. Same codes. So looks like I am stuck trouble shooting vacuum lines. Any other ideas?

DJ

 

[Banditsteve]

Blockage or contaminant in fuel injector? Stopping fuel getting through one minute and purging too much through the next? Or would that have its own code? Just chucking ideas about?

 

[tjkj2002]

Yes, those are the codes. I know they are contradictory. I ran it twice: checked the first time and said WTF so I reset and went out drove, light came on and I checked again. Same codes. So looks like I am stuck trouble shooting vacuum lines. Any other ideas?

DJ

With both of the codes I would have to personally look at the vehicle and the livedata via a scanner.This is one of those impossible code series.I'd be forking over the $$$ to have a dealership diagnose it.

 

[LibertyFever]

man you simply amaze me with your bank of knowledge TJ, its just remarkable

I'd love to see him on Jeopardy when the category is Jeep Facts
(kneel)