Shops and dealer tell me I may have a bad ECM (the one on the block) after $800.00 of guess work, I nee help. Truck is an 02, 2500, 2wd, auto, with 340K miles. She was running great, then 2 weeks ago she ran out of power. OBD codes p0112 and p0237 low volts on IAT and Turbo Boost Sensors. They replaced both sensors and cleared the codes. As soon as I start it, the codes return and I still have no power. They also tell me only the dealer can replace the ECM because it has to be programed to the truck? Any info or help, please, Thanks for the help. 85ZULU---Out

 

yes the ecm has to be programmed by cummins dealer. ecm's do not come calibrated. if those are the only codes you get I would be checking wiring before the ecm.