Engine Coolant Pump Control Module System Voltage Low
The smart coolant pump module reports the system voltage below operating range. Pump output is reduced or disabled to protect the module.
Affected components
- Smart coolant pump module
- Charging system
- Battery
Common causes
- High likelihood: Weak battery sags voltage under load
- Medium likelihood: Alternator output below regulation point
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.