No high end acceleration, code p0123

2006 CHEVROLET SILVERADO
167,000 MILES • 4.3L • 6 CYL • 2WD • AUTOMATIC
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ELDEN BUTLER
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  • 1 POST
My truck started running rough after a big rain , I had it scanned for check engine light the code that popped up was p0123 which was throttle position sensor high voltage. I changed the TPS and IAC , also changed my air filter and and cleaned the throttle body. still I can't go over 50 MPH unless down hill. I have no take off or passing acceleration. what could be the issue?
Jul 1, 2021 at 2:57 PM
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DANNY L
  • CERTIFIED EXPERT
  • 5,648 POSTS
Hello, I'm Danny.

Here is the information you requested. Here is a tutorial showing how to test electrical wiring:

https://www.2carpros.com/articles/how-to-check-wiring

I've attached below picture diagnostic steps for the code P0123 relating to the throttle position sensor. This is like a flowchart for diagnosing this code in its entirety. Let us know what you find and we'll go from there. Hope this helps and thanks for using 2CarPros.
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Jul 1, 2021 at 8:01 PM