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03-10-2013, 03:34 PM
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#1 |
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Registered User
Join Date: Oct 2011
Location: Hebron, IN
Posts: 194
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2002 gmc yukon codes: P0171 P0174
2002 gmc yukon with 5.3 threw these two codes the other day. About 110,000mi, new maf last year, serp belt last year, and a water pump at least 6 years ago.
Had a buddy read it, and popped codes P0171 and P0174. Lean on bank 1 and 2. He cleared the codes, going to drive it and see if they come back. Has anybody dealt with these? and what fixed it? Any ways to test it, before throwing money and parts at it? Thanks David
__________________
Mom, I think I may have broke something. My tires keep spinning and leaving black marks every where 
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03-10-2013, 05:36 PM
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#2 |
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Registered User
Join Date: Dec 2012
Location: saskachewan
Posts: 150
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Re: 2002 gmc yukon codes: P0171 P0174
possible intake gaskets leaking.if they are the orange ones change them to the new green ones.
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03-10-2013, 06:43 PM
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#3 |
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Registered User
Join Date: Nov 2008
Location: manly iowa
Posts: 390
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Re: 2002 gmc yukon codes: P0171 P0174
Vacuum leak or dirty maf sensor.
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03-10-2013, 10:51 PM
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#4 |
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Registered User
Join Date: Mar 2008
Location: williamsport,pa
Posts: 329
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Re: 2002 gmc yukon codes: P0171 P0174
When was the fuel filter changed last? That would be the first place to look seeing how both banks are showing lean.
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03-10-2013, 11:01 PM
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#5 |
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Registered User
Join Date: Oct 2011
Location: Hebron, IN
Posts: 194
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Re: 2002 gmc yukon codes: P0171 P0174
Um not sure, are you thinking the fuel filter might be clogged and its allowing the same amount of air, but less fuel, causing lean code.
__________________
Mom, I think I may have broke something. My tires keep spinning and leaving black marks every where
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03-11-2013, 08:44 PM
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#6 |
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Registered User
Join Date: Mar 2008
Location: williamsport,pa
Posts: 329
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Re: 2002 gmc yukon codes: P0171 P0174
Seen it before low fuel pressure could also do it.
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03-13-2013, 03:21 PM
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#7 |
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Registered User
Join Date: Oct 2011
Location: Hebron, IN
Posts: 194
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Re: 2002 gmc yukon codes: P0171 P0174
Ok, my buddy cleared the codes when he read it, an they havent come back yet. So we'll see, and it hasnt changed how it runs.
__________________
Mom, I think I may have broke something. My tires keep spinning and leaving black marks every where
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