Codes po171 and po174 what are these codes for?

1996 GMC JIMMY

10,030 MILES • 4 CYL • 2WD • AUTOMATIC

BBARRETO

MEMBER
1 POST
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Please tell me what these codes stand for and the diagnosis.

Apr 15, 2010 at 11:08 AM

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SQM

AUTOMOTIVE REPAIR CONTRIBUTOR
6,383 POSTS

Hello,

Here are the codes:

P0171 Fuel Trim System Lean Bank 1
P0174 Fuel Trim System Lean Bank 2

https://www.2carpros.com/articles/check-engine-light-clear-codes

See attached for the diagnostics.

Thank you.

Images (Click to enlarge)

Jul 15, 2021 at 8:43 PM