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Location of throttle position sensor

Tiny
TESCHOFIELD
  • MEMBER
  • 2006 GMC ENVOY
  • 97,000 MILES
Check engine light on took car to AutoZone and they said the code P0121 is the throttle position sensor car skips or bucks from time to time while driving?
Sunday, October 16th, 2011 AT 6:07 PM

3 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,170 POSTS
The throttle position sensor is inside the throttle actuator. This code is set because the throttle bore is dirty and needs to be cleaned here is a guide to help fix the problem.

https://www.2carpros.com/articles/reduced-power-limp-mode

Please run down this guide and report back. You will need to clear the codes after you are done.

https://youtu.be/ahK_eucFi-k

Please run down these guides and report back.

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Sunday, October 16th, 2011 AT 6:09 PM
Tiny
WRENCHTECH
  • MECHANIC
  • 20,757 POSTS
This truck has a "drive by wire" system and the TPS is internal to the electronic throttle body assembly and is replaced as a complete unit if its bad.
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Sunday, October 16th, 2011 AT 6:30 PM
Tiny
DARRENVERTREES
  • MEMBER
  • 1 POST
Wrenchtech I will have to say that I do not agree at all, the ac delco part can be purchased on ebay for around 130 and can be installed in fifteen minutes, im glad I dont run my shop how you described this, I can sleep at night and I wouldnt charge anything over $200 for this simple procedure including the learning procedure for the new TB
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Thursday, August 16th, 2012 AT 3:44 AM

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