A Rocker Arm Actuator Position Sensor Circuit Intermittent/Erratic Bank 1
The position sensor signal jumps or drops out intermittently. Usually a loose connector or a chafed wire in the harness.
Affected components
- Rocker arm position sensor a b1
- Wiring harness
Common causes
- High likelihood: Sensor connector not fully seated
- Medium likelihood: Harness chafed against valve cover or cam carrier
- Low likelihood: Connector with intermittent contact under vibration
Diagnostic notes
- The malfunction indicator lamp may illuminate
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.