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p0171 and p0101 2004 Chevy Silverado


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azurite2005
Novice

Jul 12, 2021, 3:46 PM

Post #1 of 2 (876 views)
p0171 and p0101 2004 Chevy Silverado Sign In

Hi.

2004 Chevy Silverado 4.8L 200K miles
I could use some guidance on how to troubleshoot two engine codes that my truck has. P0101 and P0171. I erased the codes, unfortunately. This is what I have done thus far:
-Inspected the Air filter (it is clean)
- Cleaned the MAF sensor with MAF cleaner.
- Took live readings with my Zurich ZR8 code reader
The LTFT1 and LTFT2 hover around +18% when engine warm and idling around 600 RPM.
- The MAF values are responsive to changes in engine RPM.
I don't have any special tools to check for vacuum leaks.
What are my next steps?


(This post was edited by azurite2005 on Jul 12, 2021, 4:17 PM)


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Jul 12, 2021, 4:41 PM

Post #2 of 2 (860 views)
Re: p0171 and p0101 2004 Chevy Silverado Sign In

You have a lean code and a MAF code. My guess is there is something wrong with either the MAF or the snorkel is sucking air somewhere between the sensor and the throttle body.



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