OBD-II code · Powertrain (generic, extended)
P264B A Rocker Arm Actuator Position Sensor Circuit Range/Performance Bank 1
The position sensor reading does not transition cleanly between the two valve lift modes on bank 1. Sensor drift or mechanical wear leaves the signal between expected values.
Is it safe to drive with P264B?
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 B1, Actuator Mechanism
Related codes
- P265BB Rocker Arm Actuator Position Sensor Circuit Range/Performance Bank 1
- P266BA Rocker Arm Actuator Position Sensor Circuit Range/Performance Bank 2
- P267BB Rocker Arm Actuator Position Sensor Circuit Range/Performance Bank 2
- P2648A Rocker Arm Actuator Control Circuit Low Bank 1
- P2649A Rocker Arm Actuator Control Circuit High Bank 1
- P264AA Rocker Arm Actuator Position Sensor Circuit Bank 1
- P264CA Rocker Arm Actuator Position Sensor Circuit Low Bank 1
- P264DA Rocker Arm Actuator Position Sensor Circuit High Bank 1
- P264EA Rocker Arm Actuator Position Sensor Circuit Intermittent/Erratic Bank 1
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.