Codes po171 and po174 what are these codes for?

1996 GMC JIMMY
10,030 MILES • 4 CYL • 2WD • AUTOMATIC
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BBARRETO
  • MEMBER
  • 1 POST
Please tell me what these codes stand for and the diagnosis.
Apr 15, 2010 at 4:08 AM
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SQM
  • ✓Experienced Mechanic
  • 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.
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Jul 15, 2021 at 1:43 PM
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