I am having the same issue now with my truck, shifting issue and going into power reduced mode. First time it happened I cleared it by disconnecting the batteries for some time. Second time I took it to the dealership, they flashed the computer and said they couldn't replicate the issue and to bring back if it happens again. Well last night it happened again, had the truck back for less than a week. Have not even used a full tank of fuel. I am dropping it back off today, I will update with outcome. Glad I seen this thread to see its an actual concern, I'm sorry for all those that are dealing with this. I paid 90K for a crap box, currently have 36.5K on the clock.