P266C"A" Rocker Arm Actuator Position Sensor Circuit Low (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
- P266C reports a bank 2 position sensor signal for actuator A that has fallen under its lower plausibility limit. Grounded signal wires, a missing sensor supply or an internal sensor short pull it down; a connector left half unplugged after other work on the harder-to-reach side of the engine is another possible trigger. No manufacturer documents P266C publicly, so there are no published thresholds. Under CARB's comprehensive component rules, such a range check is mandatory for sensors in a lift system. The controller then holds bank 2 at a safe fixed lift. The high-side partner is P266D, the bank 1 equivalent P264C.
- What you may notice
- MIL on
- Bank 2 held at fixed lift
- Less pulling power
- Likely causes
- LikelyBank 2 sensor signal shorted to ground
- PossibleConnector not fully seated after other repairs
- PossibleMissing sensor supply voltage
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Hard · Usually a job for a workshop.Typical cost: €80 – €650
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.