OBD-II code · Powertrain (generic, extended)

P265B B Rocker Arm Actuator Position Sensor Circuit Range/Performance Bank 1

The position sensor reading does not transition cleanly between the two valve lift modes for actuator B on bank 1.

Is it safe to drive with P265B?

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 B B1, Actuator Mechanism

Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.