Check engine light on, P1125 code, reduced engine power

Tiny
RNB_82_05
  • MEMBER
  • 2003 GMC YUKON
  • 142,000 MILES
For my 2003 gmc yukon xl, the checl engine light is on, we are getting a p1125 code and reduced engine power. We have replaced the app
sensor and thottle body, but no has change. What else can we do.
Sunday, July 22nd, 2012 AT 5:27 PM

7 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,796 POSTS
Either the throttle body or the pedal sensor is bad. You need to have it checked to verify

Roy
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Sunday, July 22nd, 2012 AT 5:33 PM
Tiny
RNB_82_05
  • MEMBER
  • 4 POSTS
Even though both were brand new parts, the thottle body was replaced yesterday, and the app sensor about a moth ago.
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Sunday, July 22nd, 2012 AT 5:54 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,796 POSTS
New gm parts? Was the module on the pedal sensor?

Roy
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Sunday, July 22nd, 2012 AT 6:02 PM
Tiny
RNB_82_05
  • MEMBER
  • 4 POSTS
The parts came from orileys I was wondering if not being oe would that have anything to do with it also the evap purge valve is loose think o ring may be worn down im just out of ideals
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Sunday, July 22nd, 2012 AT 6:08 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,796 POSTS
I would use only gm parts for that repair.

Evap issue has no effect on this system.

Roy
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Sunday, July 22nd, 2012 AT 6:09 PM
Tiny
RNB_82_05
  • MEMBER
  • 4 POSTS
Yes the module was on the pedal
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Sunday, July 22nd, 2012 AT 6:20 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,796 POSTS
Ok, still would only go with gm original. Had no luck with aftermarket parts.

Get it checked at a shop to confirm. Make sure all connectors are clean and tight

Roy
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Sunday, July 22nd, 2012 AT 7:09 PM

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