OBD-II code · Powertrain (generic, extended)
P266C A Rocker Arm Actuator Position Sensor Circuit Low Bank 2
The position sensor signal for actuator A on bank 2 is below the lower 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 P266C?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyInternal short in sensor element
- PossibleSignal wire shorted to ground
- 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
- P264CA Rocker Arm Actuator Position Sensor Circuit Low Bank 1
- P265CB Rocker Arm Actuator Position Sensor Circuit Low Bank 1
- P267CB Rocker Arm Actuator Position Sensor Circuit Low Bank 2
- P2669Actuator Supply Voltage B Circuit / Open
- P266AA Rocker Arm Actuator Position Sensor Circuit Bank 2
- P266BA Rocker Arm Actuator Position Sensor Circuit Range/Performance Bank 2
- P266DA Rocker Arm Actuator Position Sensor Circuit High 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
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.