B Rocker Arm Actuator Position Sensor Circuit High Bank 1
The position sensor signal for actuator B on bank 1 is above the upper diagnostic threshold. Wiring faults of this kind typically come from chafing, water ingress at connector seals, or pin push-back — a wiggle test on the harness while the code is active often confirms the location.
Affected components
- Rocker arm position sensor b b1
- Wiring harness
Common causes
- High likelihood: Open sensor element
- Medium likelihood: Signal wire shorted to the 5 V reference
- Low likelihood: Connector pins corroded - high contact resistance
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.