P2660"B" Rocker Arm Actuator Control Circuit/Open (Bank 2)
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P2660 concerns V-type or boxer engines with switchable rocker arms on both cylinder banks: the controller sees the drive circuit of solenoid B on bank 2, the side without cylinder 1, as broken. An open coil, a disconnected plug after valve cover work, or a cut wire leaves the output without load, so the command and the electrical feedback disagree. No manufacturer documents P2660 publicly, and the Honda V6 cases on record involve bank 1 only. GM's 2015 table 15OBDG05 illustrates the method on actuator A with a driver check from 11 V upward and 100 failures in 120 samples. CARB requires circuit monitoring on every lift system output. The bank 1 equivalent is P2650; shorts on this line are P2663 and P2664.
- What you may notice
- MIL on
- Bank 2 B stage inactive, uneven running between banks possible
- Likely causes
- LikelySolenoid B plug on bank 2 left unplugged or not latched after repairs
- PossibleOpen coil in bank 2 solenoid B
- PossibleCut or broken wire on the bank 2 harness branch
- 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: €60 – €500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.