Have had the truck for about a year. This will be the 3rd time the at error light came on. The first 2 times after the truck sat over night the light went off the next day. Today I went ahead and got an appt for tomorrow. Enough is enough... let em check it out!.. my 2016 titan xd cummins never lit up like a Christmas tree like this one has... I remember ATC had 2 of these trucks. First one was flawless and 2nd one alot of problems... hope I am not following in his tracks...