2002 GMC Envoy check engine light reduce engine power

2002 GMC ENVOY
180,000 MILES • 6 CYL • 2WD • AUTOMATIC
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MAGVIEW
  • MEMBER
  • 1 POST
Reduce engine power . what this mean?
Aug 28, 2008 at 5:06 PM
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MMPRINCE4000
  • ✓ASE Certified Mechanic
  • 8,548 POSTS
  • ASE Certified Mechanic
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.
Oct 21, 2008 at 7:23 AM
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