I have a 2007 DT466 4300, the tow company I work for says that it shuts down at random times. I have had this happen already and its getting annoying seeing i cant find the issue. They replaced the lifter pump, just had a oil change done to it with fuel filter change too. Unaware of any codes being thrown, but the electronics stay on in the cab. Whenever it shut down we have found that swapping the starter relay and IDM relay that it sometimes fires right back up. The last time it did that i swapped the relays and nothing. The next day it fired right up could it be a bad ICP sensor or IPR? I eliminated the plug that has 2 wires going into it of the battery by the starter and that didnt solve the issue. They also said that they replaced the FICM mother board too.