Codes P1516 and p2101

2007 CHEVROLET TAHOE
20,000 MILES • 5.3L • V8 • 2WD • AUTOMATIC
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EPDOGG
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  • 1 POST
When I start my car, it shakes really hard and there is no acceleration.
May 11, 2022 at 7:50 AM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.
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SQM
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 6,383 POSTS
Hello,

The codes:
P1516: Throttle Actuator Control (TAC) Module Throttle Actuator Position Performance.
P2101: Throttle Actuator Position Performance.

One of the most common causes for the engine to go into limp mode is having a dirty throttle actuator. When the actuator is dirty it is unable to send correct data to the ECM, and that can trigger the limp mode with no power or acceleration.

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

First try cleaning out the throttle actuator then clear the codes and see if that takes care of the issue.

Here is a helpful guide on how to clean the throttle actuator:

https://www.2carpros.com/articles/throttle-actuator-service

I have attached the troubleshooting guide for the codes P1516/P2101 below for your reference.

Let me know of any questions.
Thank you.

May 11, 2022 at 8:45 AM
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