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Since all of your codes point to a 5 volt supply issue, I would definitely check out the 5 volt supply and ground. Also, I would check the supply voltage and ground for the ECM and look over the gene
Starting this thread to help troubleshoot and document a host of problems with my father's "new" truck a 2001 24v 3500 dually with a 6 speed.
Problems Truck will start and idle fine but will surge/buck inconsistently with throttle/load
Codes p 1475 p0522 p0122 p 1295 p 0237 p 1488 and the companion code.
Alternator ac noise seamed good <.03
No wait to start light but truck has a grid heater delete block on it not shure if it was installed "correctly"
Probably is ecu but I'm going to check out the 5v system just to check. I did notice temp sensor was spliced thinking wires might be swapped? Grounding out the circuit Truck seamed to behave better when warmed up.
Questions! Does the wait to start light still light up momentarily without grid heaters? Also lift pump cycled for a shorter time then my truck does (2000 vs 2001) both pumps are aftermarket airdog pumps.
Can ecus be repaired/rebuilt? Any new ones on the market?
Are ecus truck specific? I can't swap a 2000 auto with a 2001 manual?
Thank yall for reading!