B Rocker Arm Actuator Position Sensor Circuit Range/Performance Bank 2
The position sensor reading does not transition cleanly between the two valve lift modes for actuator B on bank 2.
Affected components
- Rocker arm position sensor b b2
- Actuator mechanism
Common causes
- Medium likelihood: Sensor signal drift after thermal aging
- Medium likelihood: Worn lock pin reduces travel between modes
- Low likelihood: Sensor element aged beyond calibration window
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.