How to fix p1680 code on 2004 Trailblazer

Question

Check engine light on and reduced power light on. How to fix.

Answer 1

Hi there

This code is pointing to an issue with the ECM. It's got an internal error and you will likely have to replace it.

P1680 CHEVROLET - Control Module Not Programmed

Read more: https://www.autocodes.com/p1680_chevrolet.html