Check engine light doesn't come on. And my onboard diagnostic is not workingd

Asked by Onstuck62 Jul 07, 2019 at 05:07 PM about the 2008 Chevrolet Malibu LTZ FWD

Question type: Maintenance & Repair

I change my TCM. Took the car to the
dealership to be programmed. Now I can't
pass emissions because the check engine
light will not come on. It's like it's turned off.

2 Answers

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