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Re: Maxforce DT MAF and EGR codes
Posted to HD/Fleet Forum on 4/24/2019

OK here's where I'm at:

I lack B+ at ACT relay #86 & #30. The 40A fuse in the battery box is fine. Curiously, it powers other circuits as the truck won't run with it disconnected and it sets DTCs for throttle valve and "key switch battery potential". I didn'... Login to read more.