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Daniel Wilson
Daniel Wilson,
Category: Medium and Heavy Trucks
Satisfied Customers: 1634
Experience:  Owner at DJ Wilson
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My 2002 Frieghtliner RV is showing code of MID: 128, SID: 254,

Customer Question

My 2002 Frieghtliner RV is showing code of MID: 128, SID: 254, FMI: 8. Check engine light and error first started coming on during downhill segments, but just recently became more active, sometimes at cold startup. Where should I check for problem? Local dealer recommended overspeed switch, but my rig doesn't have one.
Submitted: 1 year ago.
Category: Medium and Heavy Trucks
Expert:  roybelding replied 1 year ago.
good afternoon my name is ***** ***** I will assist That code usually means there is a problem with the power connections to your ECM which could be anything from loose battery connections to bad ECM power relay. That code translates to 626 which is an unexpected reset DTC. I have found alot problems at the small power and ground connecters at the battery which go up to the ECM power relay. check all connections including the battery Roy