Posted 10/25/2026 13:28 (#11785950 - in reply to #11785419) Subject: RE: Trouble with Freightliner
Illinois
A faulty ECM can act that way. Took us 1 year and multiple service calls on a seasonally ran truck to discover this. ECMs have soldered connections that go bad. Sometimes the truck shakes enough to make the connections work, then eventually they no longer make contact. Local dealer has a extra ECM at the shop they install to diagnose a bad ECM, no other simple way. I would do this next.
Trouble with Freightliner
