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

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