U007EControl Module Communication Bus L Off
- Generic OBD-II code · Network
- How the car detects it
- There is no public manufacturer documentation for U007E; the letter L is reserved for vehicles with a dozen or more networks. The code marks the last step of the CAN error ladder. A node stays error active while its counters are below 128 and signals faults with dominant flags; between 128 and 255 it becomes error passive and may flag errors only recessively; once transmit errors exceed 255 it goes bus off and stops sending, as Wikipedia's CAN bus article describes. U007E therefore means that a module has failed repeatedly, not once. What the driver notices depends on what the silent module controls, from a missing comfort function to warning lamps, and partner modules then store their own lost-communication codes.
- What you may notice
- Single comfort or assistance function missing
- Partner modules report lost communication
- Likely causes
- PossiblePersistent short or bad contact on Bus L
- PossibleFault inside the reporting module's CAN interface
- Repair
- Hard · Usually a job for a workshop.Typical cost: €60 – €800
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.