P2662"B" Rocker Arm Actuator System Stuck On (Bank 2)
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- Needs a drive cycle to confirm a fix
- How the car detects it
- With P2662 the controller concludes that stage B on bank 2 stays switched after it has requested the default mode. Detection depends on the design: a pressure switch that keeps indicating oil pressure, or engine behaviour on that bank that still matches the engaged state. A solenoid that seeps oil when closed, a return path that cannot drain, or locking pins jammed by debris or wear keep the rockers coupled. Because only one bank is affected, the engine may idle unevenly or misfire on that side, especially when cold. No manufacturer documents P2662 publicly; Honda's published stuck-on case for stage B (P2652) refers to bank 1. CARB requires such stuck conditions in valve lift systems to be detected. Opposite fault on this bank: P2661.
- What you may notice
- MIL on
- Uneven idle or misfire on bank 2, worse when cold
- Likely causes
- LikelyBank 2 solenoid B seeping oil when closed
- PossibleBlocked drain path keeping oil pressure on the rockers
- PossibleLocking pins jammed in the coupled position by debris or wear
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Often possible to do yourself.Typical cost: €50 – €900
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.