OBD-II code · Powertrain (generic, extended)
P2647 A Rocker Arm Actuator System Stuck On Bank 1
On variable valve lift systems (e.g. Honda VTEC) the ECU detects that the bank 1 rocker arm actuator is stuck in the engaged (high lift) position. Idle quality and fuel economy are affected.
Is it safe to drive with P2647?
Usually safe for short trips, but don’t ignore it: the underlying fault can get more expensive over time.
Common causes
- Most likelyInsufficient oil pressure / level
- PossibleStuck VVL solenoid
- Less likelyCarbon or debris buildup preventing free movement
Repair at a glance
- Difficulty
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1.5–6 h
- Emissions test
- Likely to fail
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- Vvl Actuator, Rocker Arm, Oil Passages
Related codes
- P2652B 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
- P2644Torque Management Feedback Signal B High
- P2645A Rocker Arm Actuator Control Circuit / Open Bank 1
- P2646A Rocker Arm Actuator System Performance/Stuck Off Bank 1
- P2648A Rocker Arm Actuator Control Circuit Low Bank 1
- P2649A Rocker Arm Actuator Control Circuit High Bank 1
- P264AA Rocker Arm Actuator Position Sensor Circuit Bank 1
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.