OBD-II code · Powertrain (generic, extended)
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.
Is it safe to drive with P266D?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyOpen sensor element
- PossibleSignal wire shorted to the 5 V reference
- Less likelyConnector pins corroded - high contact resistance
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 0.8–3 h
- Emissions test
- Usually unaffected
- Parts involved
- Rocker Arm Position Sensor A B2, Wiring Harness
Related codes
- P264DA Rocker Arm Actuator Position Sensor Circuit High Bank 1
- P265DB Rocker Arm Actuator Position Sensor Circuit High Bank 1
- P267DB Rocker Arm Actuator Position Sensor Circuit High Bank 2
- P266AA Rocker Arm Actuator Position Sensor Circuit Bank 2
- P266BA Rocker Arm Actuator Position Sensor Circuit Range/Performance Bank 2
- P266CA Rocker Arm Actuator Position Sensor Circuit Low Bank 2
- P266EA Rocker Arm Actuator Position Sensor Circuit Intermittent/Erratic Bank 2
- P266FA/C Refrigerant Distribution Valve A Control Circuit Driver Current/Temperature Too High
- P2670Actuator Supply Voltage B Circuit Low
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.