Control Module Communication Bus "B" Performance
Bus B is operational but performance is degraded — error frames or out-of-spec timing. Modules on this bus may behave erratically.
Affected components
- Can bus wiring
- Control module
Common causes
- High likelihood: Corrosion or poor contact in 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
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.