Engine Coolant Flow Control Valve Supply Circuit Low
The engine coolant flow control valve reports a supply circuit low condition. Coolant routing between engine and radiator branches cannot be commanded as expected.
Affected components
- Engine coolant flow control valve
- Wiring harness
- Ecm
Common causes
- High likelihood: Supply fuse blown
- Medium likelihood: Open in supply wire
- Low likelihood: Connector pins corroded - high contact resistance
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.