Coolant Pump F Control Circuit Performance/Stuck Off
Coolant pump F is commanded on but does not respond as expected. Pump motor stuck, relay weld, or driver fault.
Affected components
- Coolant pump f
- Wiring harness
- Ecm
Common causes
- High likelihood: Pump motor mechanically stuck
- Medium likelihood: Output driver fault
- Low likelihood: Carbon or debris buildup preventing free movement
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.