Engine Coolant Pump Control Module System Voltage High
The smart coolant pump module reports the system voltage above operating range. Pump output is reduced or disabled to protect the module.
Affected components
- Smart coolant pump module
- Charging system
Common causes
- High likelihood: Alternator regulator failed to limit output
- Low likelihood: Load dump transient after disconnecting a heavy load
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.