We put a DEF pump on this unit a year ago and cleaned out the DEF tank and lines. This is a road tractor and the driver takes care of this like it was his own truck. He keeps that DEF tank cap area clean and only puts in DEF from new sealed containers he carries. How could another pump be logging 3559 and then scr inducements faults. Cummins says most of the time fault code 3559 is wiring or supply voltage / ground related. Lets see if Cummin's opinion was right on this particular failure.
21 июн 2024