OBD-II code · Powertrain (generic, extended)
P2652 B Rocker Arm Actuator System Stuck On Bank 1
The rocker arm actuator B on bank 1 stays in the activated state when commanded off. Engine cannot return to the alternate lift or cylinder mode.
Is it safe to drive with P2652?
Usually safe for short trips, but don’t ignore it: the underlying fault can get more expensive over time.
Common causes
- Most likelyMechanical lock pin stuck in activated position
- PossibleOil control valve spool stuck open
- Less likelyCarbon or debris buildup preventing free movement
Repair at a glance
- Difficulty
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1.5–5.5 h
- Emissions test
- Usually unaffected
- Parts involved
- Rocker Arm Actuator B B1, Oil Control Valve
Related codes
- P2647A Rocker Arm Actuator System Stuck On Bank 1
- P2657A Rocker Arm Actuator System Stuck On Bank 2
- P2662B Rocker Arm Actuator System Stuck On Bank 2
- P264FEngine Serial Number Not Programmed or Incompatible
- P2650B Rocker Arm Actuator Control Circuit / Open Bank 1
- P2651B Rocker Arm Actuator System Performance/Stuck Off Bank 1
- P2653B Rocker Arm Actuator Control Circuit Low Bank 1
- P2654B Rocker Arm Actuator Control Circuit High Bank 1
- P2655A Rocker Arm Actuator Control Circuit / Open Bank 2
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.