Engine Coolant Flow Control Valve Position Sensor Circuit Intermittent/Erratic
The position sensor signal of the engine coolant flow control valve drops out or jumps intermittently. Loose connector or vibration-sensitive contact.
Affected components
- Engine coolant flow control valve position sensor
- Wiring harness
- Ecm
Common causes
- High likelihood: Sensor connector not seated
- Medium likelihood: Harness chafing intermittently shorts the wire
- Low likelihood: Connector with intermittent contact under vibration
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.