2006 Ram 3500 4X4 Mega cab 5.9 auto
Recently while on vacation I had to have work done at a dealership and an update flash was done. the truck ran fine on the return trip for the first 8 hrs and then the "wait to start" (coil symbol) came on while driving down the road. after this time power was reduced though it showed no other signs or problems. about 8hrs later while running down the road the "wait to start" went off and the power returned. Ideas as to why and what happened.