Mechanics

WHAT MAKES THE REDUCED ENGINE POWER LIGHT TO COME ON?

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?
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Tajuana
November 18, 2011.




First get codes read to help with diagnosis.

Tiny
Fixitmr
Nov 18, 2011.
The reduced power means you are in PCM limp mode.

Tiny
Fixitmr
Nov 18, 2011.
Most common cause is wiring at throttle sensor.

Tiny
Fixitmr
Nov 18, 2011.
Another common cause is dirty/gummed up throttle plate.
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Tiny
Fixitmr
Nov 18, 2011.

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