OBD-II code · Powertrain (generic, extended)
P266B A 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 A on bank 2.
Is it safe to drive with P266B?
Usually safe for short trips, but don’t ignore it: the underlying fault can get more expensive over time.
Common causes
- PossibleSensor signal drift after thermal aging
- PossibleWorn lock pin reduces travel between modes
- Less likelySensor element aged beyond calibration window
Repair at a glance
- Difficulty
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1–4.5 h
- Emissions test
- Usually unaffected
- Parts involved
- Rocker Arm Position Sensor A B2, Actuator Mechanism
Related codes
- P264BA Rocker Arm Actuator Position Sensor Circuit Range/Performance Bank 1
- P265BB Rocker Arm Actuator Position Sensor Circuit Range/Performance Bank 1
- P267BB Rocker Arm Actuator Position Sensor Circuit Range/Performance Bank 2
- P2668Fuel Mode Indicator Lamp Control Circuit
- P2669Actuator Supply Voltage B Circuit / Open
- P266AA Rocker Arm Actuator Position Sensor Circuit Bank 2
- P266CA Rocker Arm Actuator Position Sensor Circuit Low Bank 2
- P266DA Rocker Arm Actuator Position Sensor Circuit High Bank 2
- P266EA Rocker Arm Actuator Position Sensor Circuit Intermittent/Erratic Bank 2
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.