OBD-II code · Network
U0092 CAN Communication Bus "C" Performance
Bus C shows degraded performance with elevated error counters but has not yet gone bus-off. Sporadic message losses on modules attached to Bus C.
Is it safe to drive with U0092?
Usually safe for short trips, but don’t ignore it: the underlying fault can get more expensive over time.
Common causes
- Most likelyMarginal Bus C wiring or connector
- PossibleOne module on Bus C transmitting marginal frames
- Less likelyGateway module routing CAN messages incorrectly
Symptoms
- Multiple warning lights may illuminate
- Affected modules may go into limp mode or shut down
- Specific functions inoperative depending on module
- Diagnostic tools may show communication faults
Repair at a glance
- Difficulty
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1–5 h
- Emissions test
- Usually unaffected
- Parts involved
- Can Bus Wiring
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.