I've been having trouble for a week now. Stopped truck to fill up and it would not restart. Towed it home and it would fire after some very fast cranking. Acted like it had no fuel. Fires this way every time. Had a p0603 and p1211 code. Also had low voltage. New alternator and icp sensor. still same problem. Once truck has been run and warmed up if it shuts down it will not restart. No other codes are pressent. Passed buzz and all other tests my buddies scanner would run.