Crowens31
New member
Has anyone gotten a solution to this check engine code for emission systems? My new 2023 AT4 1500 diesel with 600 miles got this code over this weekend. I noticed my fob start and my gmc app start would not work then I saw the check engine light on once inside the vehicle to start. Other threads do not seem promising but going to dealer first thing Monday morning as I drive. 40+ miles each way to work. I love the MPG in the diesel for this truck but irritated to say the least on error code after 600 miles of owning it.