Check engine light

Htown_LTZ · January 11, 2022

I have a 2020 silverado 1500 with the 3.0 duramax, close to 13K miles. Got it back in Nov 2019. I seem to be getting a lot of check engine lights lately. Obviously I don't drive it much as I have a company vehicle. I think I read somewhere that these engines need to run at least 12 miles or more daily in order for the system that burns off the excess exhaust gases, I can't remember what it's called, to work properly. I am thinking of trading in for the 2022 refresh but contemplating if it's worth getting another duramax. Any info and feedback would be greatly appreciated.

CamGTP · January 11, 2022

Are the check engine lights even related to the emissions system you are talking about?

It's called a regen for the DPF system. The exhaust must be hot enough to run through the regen process, so lots and lots of short trips is not as good for it.

Htown_LTZ · January 12, 2022

That's probably why. Like I said, I don't drive it every day, just weekends, and that's just to go to the grocery store or to the barbershop. The last time I took it in, they said some sensor on the exhaust was loose and that's what was throwing that check engine light.