Tahoe throws P1516 code and puts truck into reduced enginge power.

Tiny
FIREMAX
  • 2003 CHEVROLET TAHOE
  • 300,000 MILES

I have replaced the app sensor. I have replaced the tac. I have cleaned and replaced all grounds on the engine. I have thoroughly checked all wires and connections on the app and tac. Cleaned and tightened all battery connections. Dont know where to turn or what to try next.

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Saturday, May 12th, 2012 AT 4:09 AM

3 Replies

Tiny
FIXITMR
  • MEMBER

Does your PCM have all updates?

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Saturday, May 12th, 2012 AT 4:30 AM
Tiny
FIREMAX
  • MEMBER

Yes it does.

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Saturday, May 12th, 2012 AT 1:01 PM
Tiny
ASEMASTER6371
  • EXPERT
  • 25,554 POSTS

Did you use dealer new parts? Did you replace them together? If you did the pedal first and had a shorted throttle body and then replaced that, it may have burned out the pedal sensor/module.

Roy

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Saturday, May 12th, 2012 AT 5:39 PM

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