OBD-II code · Powertrain (generic, extended)
P2649 A Rocker Arm Actuator Control Circuit High Bank 1
Voltage on the rocker arm actuator A control line on bank 1 is above the expected window. Typical causes are a short to battery or an open solenoid coil.
Is it safe to drive with P2649?
Usually safe for short trips, but don’t ignore it: the underlying fault can get more expensive over time.
Common causes
- Most likelyControl wire shorted to B+
- PossibleOpen solenoid coil
- Less likelyConnector pins corroded - high contact resistance
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 Actuator A B1, Oil Control Valve, Wiring Harness
Related codes
- P2654B Rocker Arm Actuator Control Circuit High Bank 1
- P2659A Rocker Arm Actuator Control Circuit High Bank 2
- P2664B Rocker Arm Actuator Control Circuit High Bank 2
- P2646A Rocker Arm Actuator System Performance/Stuck Off Bank 1
- P2647A Rocker Arm Actuator System Stuck On Bank 1
- P2648A Rocker Arm Actuator Control Circuit Low Bank 1
- P264AA Rocker Arm Actuator Position Sensor Circuit Bank 1
- P264BA Rocker Arm Actuator Position Sensor Circuit Range/Performance Bank 1
- P264CA Rocker Arm Actuator Position Sensor Circuit Low Bank 1
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.