Coolant Heater A Supply Voltage Circuit
Coolant heater A supply voltage circuit reports a fault. Heater may not start when commanded.
Affected components
- Coolant heater a
- Coolant heater a control module
Common causes
- High likelihood: Supply fuse blown
- Medium likelihood: Wiring fault
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.