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What makes the reduced engine power light to come on?

Tiny
TAJUANA
  • MEMBER
  • 2004 GMC YUKON
  • 11,500 MILES
First the reduced engine power light a come and then the stability stystem disable light a come, then we cant give the car no acceleration, cut the car off for a few minutes, and the can drive it again?
Friday, November 18th, 2011 AT 7:49 PM

4 Replies

Tiny
FIXITMR
  • MECHANIC
  • 9,990 POSTS
First get codes read to help with diagnosis.
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Friday, November 18th, 2011 AT 8:06 PM
Tiny
FIXITMR
  • MECHANIC
  • 9,990 POSTS
The reduced power means you are in PCM limp mode.
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Friday, November 18th, 2011 AT 8:07 PM
Tiny
FIXITMR
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Most common cause is wiring at throttle sensor.
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Friday, November 18th, 2011 AT 8:10 PM
Tiny
FIXITMR
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Another common cause is dirty/gummed up throttle plate.
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Friday, November 18th, 2011 AT 8:16 PM

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