OBD-II code · Powertrain (generic, extended)
P2650 B Rocker Arm Actuator Control Circuit / Open Bank 1
The controller cannot drive the rocker arm switching actuator B on bank 1. The second valve lift mode cannot be commanded.
Is it safe to drive with P2650?
Usually safe for short trips, but don’t ignore it: the underlying fault can get more expensive over time.
Common causes
- Most likelyOpen coil in oil control valve
- PossibleBroken control wire
Repair at a glance
- Difficulty
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1.5–5 h
- Emissions test
- Usually unaffected
- Parts involved
- Rocker Arm Actuator B B1, Oil Control Valve, Wiring Harness
Related codes
- P2645A Rocker Arm Actuator Control Circuit / Open Bank 1
- P2655A Rocker Arm Actuator Control Circuit / Open Bank 2
- P2660B Rocker Arm Actuator Control Circuit / Open Bank 2
- P264DA Rocker Arm Actuator Position Sensor Circuit High Bank 1
- P264EA Rocker Arm Actuator Position Sensor Circuit Intermittent/Erratic Bank 1
- P264FEngine Serial Number Not Programmed or Incompatible
- P2651B Rocker Arm Actuator System Performance/Stuck Off Bank 1
- P2652B Rocker Arm Actuator System Stuck On Bank 1
- P2653B Rocker Arm Actuator Control Circuit Low Bank 1
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.