Coolant Pump D Control Circuit High
Coolant pump D reports a control circuit high condition. Coolant circulation through the affected loop cannot be commanded reliably.
Affected components
- Coolant pump d
- Wiring harness
- Ecm
Common causes
- High likelihood: Control wire shorted to B+
- Medium likelihood: Open pump motor
- Low likelihood: Connector pins corroded - high contact resistance
Diagnostic notes
- The malfunction indicator lamp may illuminate
- Reduced-power or limp mode may occur
Related codes
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.