U02BELost Communication With Trailer Backup Assist Control Module
- Generic OBD-II code · Network
- Turns on the check-engine light
- How the car detects it
- The trailer backup assist module steers the tow vehicle in reverse so the trailer follows a curve the driver chooses with a knob; with Ford's Pro Trailer Backup Assist the hitch angle comes from a target sticker filmed by the backup camera or from a trailer-mounted sensor. Ram names its unit TRSCM. For the 2021 Ram 1500, STAR case S2108000067 shows U02BE active in the ABS, power steering and engine controllers while the TRSCM is absent from the CAN C bus; the driver gets a throttle-control service warning, the MIL and at times Rear Park Assist unavailable. The trigger was module software: cutting its power via fuse 53 or the connector restarts it, an update was planned, and a new module does not help. Otherwise only the assist is lost.
- What you may notice
- Trailer backup assist unavailable
- Ram: throttle control message, MIL and rear park assist unavailable
- Code stored in several modules at once
- Likely causes
- LikelyModule software hangs and the unit drops off the bus (Ram 1500, 2021)
- PossibleFuse, supply or connector of the module faulty
- RareCAN wiring to the module damaged
- Repair
- Medium · Usually a job for a workshop.Typical cost: €0 – €600
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.