P2659"A" Rocker Arm Actuator Control Circuit High (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
- P2659 covers the bank 2 control circuit of actuator A reading high: the wire is shorted to a voltage source or the controller's driver stage no longer switches it to ground. No manufacturer documents P2659 publicly. On bank 1, GM's 2015 table 15OBDG05 checks this as P2649 only while the driver is commanded on, again with 100 failures out of 120 samples and a Type A fault. A short of this kind may keep the solenoid powered, so the rocker arms of bank 2 could stay switched; alternatively the controller cuts the output. Compare with P2658 for the low side and P2655 for an open circuit; measuring the voltage at the unplugged connector separates harness from controller faults.
- What you may notice
- MIL on immediately
- Bank 2 lift stays switched or switching is disabled
- Rough idle in some cases
- Likely causes
- LikelyBank 2 control wire shorted to a voltage source
- PossibleController output stage no longer switching to ground
- RareNeighbouring pins bridged in the connector
- 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 – €650
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.