2002 GMC Envoy check engine light reduce engine power

Tiny
MAGVIEW
  • MEMBER
  • 2002 GMC ENVOY
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 180,000 MILES
Reduce engine power. What this mean?
Thursday, August 28th, 2008 AT 5:06 PM

1 Reply

Tiny
MMPRINCE4000
  • MECHANIC
  • 8,548 POSTS
Have the PCM scanned at most autoparts stores for free.

It could simply be a sensor bad that is causing it to run rich, or a low coolant level. The scan should tell you what the problem is.
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Tuesday, October 21st, 2008 AT 7:23 AM

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