Codes P1516 and P2101

Tiny
EPDOGG
  • MEMBER
  • 2007 CHEVROLET TAHOE
  • 5.3L
  • V8
  • 2WD
  • AUTOMATIC
  • 20,000 MILES
When I start my car, it shakes really hard and there is no acceleration.
Wednesday, May 11th, 2022 AT 7:50 AM

1 Reply

Tiny
SQM
  • MECHANIC
  • 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.

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Wednesday, May 11th, 2022 AT 8:45 AM

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