Mechanics

CHECK ENGINE LIGHT ON, P1125 CODE, REDUCED ENGINE POWER

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.
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Rnb_82_05
July 22, 2012.




Either the throttle body or the pedal sensor is bad. You need to have it checked to verify

Roy

ASEMaster6371
Jul 22, 2012.
Even though both were brand new parts, the thottle body was replaced yesterday, and the app sensor about a moth ago.

Tiny
Rnb_82_05
Jul 22, 2012.
New gm parts? Was the module on the pedal sensor?

Roy
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ASEMaster6371
Jul 22, 2012.
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

Tiny
Rnb_82_05
Jul 22, 2012.
I would use only gm parts for that repair.

Evap issue has no effect on this system.

Roy

ASEMaster6371
Jul 22, 2012.
Yes the module was on the pedal

Tiny
Rnb_82_05
Jul 22, 2012.
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

ASEMaster6371
Jul 22, 2012.

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