2002 Chevy Silverado cold rough Idle

Tiny
FISHERMAN1
  • MEMBER
  • 2002 CHEVROLET SILVERADO
  • V8
  • 4WD
  • AUTOMATIC
  • 69,000 MILES
Code reader says code 171, 174, system too lean bank 1, system too lean bank 2. How do you fix this problem, and what is the problem.
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Saturday, January 19th, 2008 AT 8:15 AM

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Tiny
JACKSKI
  • MEMBER
I had same codes on my 02 Silverado 5.3, remanufactured MAF sensor cleared codes after a couple cold morning starts. Also cleared cold morning rough idle starts. Autozone told me when both these codes come up together it is most likely the MAF sensor, not the 02 sensors that are bad. Jackski
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Monday, February 11th, 2008 AT 7:10 PM
Tiny
JACKSKI
  • MEMBER
Check out the info on 2002 rough and uneven idle on cold starts in forums! Jackski
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Thursday, February 14th, 2008 AT 7:52 PM

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