they were replaced during the injector job and this code only appeared after tuning. i'm thinking it's the controller and was just odd coincident timing for it to happen. truck still starts fine in 30 degree weather. I really need to get it back so i can check it out. Was hoping someone could tell me if there was a tuning difference in fed and cali trucks as far as glow plug systems go. I do know the controller is totally different.
I got done with the injectors and glow plugs,, test drove it that evening,, the next day i drove it some more to make sure all was well and got it warm, came back tuned it, test drove it again, customer picked up and drove home. next day the cel came on with this code set but started fine and didnt turn the cel on until he had drove for 20-30 minutes.
