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.
Affected components
- Can bus wiring
Common causes
- High likelihood: Marginal Bus C wiring or connector
- Medium likelihood: One module on Bus C transmitting marginal frames
- Low likelihood: Gateway module routing CAN messages incorrectly
Possible 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
Diagnostic notes
- The malfunction indicator lamp may illuminate
Sources
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.