OBD-II code · Powertrain (generic, extended)

P266A A Rocker Arm Actuator Position Sensor Circuit Bank 2

The position sensor that confirms the A rocker arm switching state on bank 2 returns no usable signal.

Is it safe to drive with P266A?

Usually safe for short trips, but don’t ignore it: the underlying fault can get more expensive over time.

Common causes

  • Most likelyOpen sensor element
  • PossibleCorroded sensor connector

Repair at a glance

Difficulty
Hard
DIY friendly
Best left to a mechanic
Typical labour
1–4 h
Emissions test
Usually unaffected
Parts involved
Rocker Arm Position Sensor A B2, Wiring Harness

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