Joshzinsky

If you've updated the adapter software you may have to check if you're set on 1586 or 1939 communication

Check for oil in harness plugs like ecm and oil sensor plugs. I've seen them cause other faults.

Check wiring and if ok Replace nox sesors with updated parts. Had same problems with old sensors

Should be a reverse relay

Had the software updates done on the ecm and acm.problem solved.

Hello, my truck says evaluating dad quality 8kph limit removed and it will not go out. I have one engine code 1231-9 ecm missing signal from acm. I have changed both nox sensors, dad pump and harness, the acm, checked the wiring up the frame into the ecm. I have power and ground at the acm. Changed the power cable end at the batteries for the acm and checked the fuse. Seems like a datalink issue. Any ideas??

Truck will not remove evaluating def from display. This is my only code. No can signal from the acm. Have changed def pump and harness, both nox sensors and acm. Have power at acm and fuse is good at batteries. Help!? Anything I've missed?