Medium Speed CAN Communication Bus Performance
The medium-speed CAN bus is operating but with degraded performance — frame errors or excessive error counters. Comfort and infotainment functions may operate intermittently.
Affected components
- Can bus wiring
- Body control module
Common causes
- High likelihood: Corrosion in body harness connectors
- Medium likelihood: One module sending malformed 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
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.