2003 GMC Yukon enigne power reduced and check engine light.

Tiny
POUNDADAY
  • MEMBER
  • 2003 GMC YUKON
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 184,000 MILES
My car will be going down the road and all of a sudden it the reduced engine power light come on. I have to pull over sit a minute and crank it back and it will go again. Its now getting worse. It did it 4 times going to work this morning and that is about 20 miles from me. Any suggestions.
Wednesday, October 6th, 2010 AT 10:48 AM

4 Replies

Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
First, I'd have the trouble codes checked. Some of the national brand autostores used to check codes for free.
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Wednesday, October 6th, 2010 AT 11:01 AM
Tiny
POUNDADAY
  • MEMBER
  • 3 POSTS
The code that come up is 1516
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Wednesday, October 6th, 2010 AT 11:54 AM
Tiny
POUNDADAY
  • MEMBER
  • 3 POSTS
P1516
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Wednesday, October 6th, 2010 AT 11:55 AM
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
That has to do with your throttle control. A perceived difference between the throttle blade angle and the actual angle. I'd try cleaning the throttle bore. There is a throttle position sensor under the throttle pedal, I can't tell you that sensor is faulty? I'd probably have to use a scanner on it, that shows live engine data.
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Wednesday, October 6th, 2010 AT 12:53 PM

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