Engine Coolant Bypass Valve A Position Sensor Circuit Range/Performance
The bypass valve A position sensor reading does not correlate with commanded position. Sensor drift or worn linkage.
Affected components
- Bypass position sensor a
- Actuator linkage
Common causes
- Medium likelihood: Sensor signal drift after thermal aging
- Medium likelihood: Worn linkage between actuator and valve
- Low likelihood: Sensor element aged beyond calibration window
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.