what makes the reduced engine power light to come on?

2004 GMC YUKON
11,500 MILES
Avatar
TAJUANA
  • MEMBER
  • 1 POST
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?
Nov 18, 2011 at 7:49 PM
Advertisement
Avatar
FIXITMR
  • ✓ASE Certified Mechanic
  • 9,990 POSTS
  • ASE Certified Mechanic
first get codes read to help with diagnosis.
Nov 18, 2011 at 8:06 PM
Avatar
FIXITMR
  • ✓ASE Certified Mechanic
  • 9,990 POSTS
  • ASE Certified Mechanic
the reduced power means you are in PCM limp mode.
Nov 18, 2011 at 8:07 PM
Avatar
FIXITMR
  • ✓ASE Certified Mechanic
  • 9,990 POSTS
  • ASE Certified Mechanic
most common cause is wiring at throttle sensor.
Nov 18, 2011 at 8:10 PM
Avatar
FIXITMR
  • ✓ASE Certified Mechanic
  • 9,990 POSTS
  • ASE Certified Mechanic
another common cause is dirty/gummed up throttle plate.
Nov 18, 2011 at 8:16 PM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.