Check engine light on, p1125 code, reduced engine power

2003 GMC YUKON
142,000 MILES
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RNB_82_05
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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.
Jul 22, 2012 at 10:27 AM
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ASEMASTER6371
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either the throttle body or the pedal sensor is bad. you need to have it checked to verify

Roy
Jul 22, 2012 at 10:33 AM
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RNB_82_05
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Even though both were brand new parts, the thottle body was replaced yesterday, and the app sensor about a moth ago.
Jul 22, 2012 at 10:54 AM
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ASEMASTER6371
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new gm parts??? was the module on the pedal sensor???

Roy
Jul 22, 2012 at 11:02 AM
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RNB_82_05
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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
Jul 22, 2012 at 11:08 AM
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ASEMASTER6371
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i would use only gm parts for that repair.

evap issue has no effect on this system.

Roy
Jul 22, 2012 at 11:09 AM
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RNB_82_05
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Yes the module was on the pedal
Jul 22, 2012 at 11:20 AM
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ASEMASTER6371
  • ✓Experienced Mechanic
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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
Jul 22, 2012 at 12:09 PM
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