OBD-II code · Powertrain (generic, extended)
P2657 A Rocker Arm Actuator System Stuck On Bank 2
The rocker arm actuator A on bank 2 stays in the activated state when commanded off.
Is it safe to drive with P2657?
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 A B2, Oil Control Valve
Related codes
- P2647A Rocker Arm Actuator System Stuck On Bank 1
- P2652B Rocker Arm Actuator System Stuck On Bank 1
- P2662B Rocker Arm Actuator System Stuck On Bank 2
- P2654B Rocker Arm Actuator Control Circuit High Bank 1
- P2655A Rocker Arm Actuator Control Circuit / Open Bank 2
- P2656A Rocker Arm Actuator System Performance/Stuck Off Bank 2
- P2658A Rocker Arm Actuator Control Circuit Low Bank 2
- P2659A Rocker Arm Actuator Control Circuit High Bank 2
- P265AB Rocker Arm Actuator Position Sensor Circuit Bank 1
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.