Coolant Heater A Control Module System Voltage
The system voltage feedback of the coolant heater A control module is outside the expected window.
Affected components
- Coolant heater a
- Coolant heater a control module
Common causes
- High likelihood: System voltage drifted
- Medium likelihood: Feedback wire 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.