P266D
A Rocker Arm Actuator Position Sensor Circuit High Bank 2
The position sensor signal for actuator A on bank 2 is above the upper diagnostic threshold. Wiring faults of this kind typically come from chafing, water ingress at connector seals, or pin push-back — a wiggle test on the harness while the code is active often confirms the location.
- Check engine light: Yes
- Emissions related: No
- Repair difficulty: medium
Common causes
Ordered by how often each turns out to be the cause.
- Open sensor elementCommon
- Signal wire shorted to the 5 V referencePossible
- Connector pins corroded - high contact resistanceLess likely
Parts involved
- Rocker Arm Position Sensor A B2
- Wiring Harness
P266D is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.