I am having issues programming my 2008 F250 6.4 liter. The DPF delete pipe has been removed, I have a magna flow, cold air intake and Custom DP-Tuner for my truck. I recently took it to the dealer (after bringing it back to the stock tune) because I thought my High Pressure Fuel Pump went out. THis was the code that came off of my truck. This was not the case. The updated my truck and now I am unable to get my tuner to reprogram my truck it is giving me a Code 1021 and says to contact the Dealer.
Girl in A Truck