P264C"A" Rocker Arm Actuator Position Sensor Circuit Low (Bank 1)
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P264C is set when the signal from the position sensor of rocker arm actuator A, bank 1, sits below its valid window. Typical electrical explanations are a short of the signal wire to ground, a lost 5 V reference, or a sensor that has failed internally. CARB lists such out-of-range checks for every sensor in a lift or timing system under the comprehensive component rules. No carmaker publishes P264C with a threshold; it would only appear on engines whose actuator carries position feedback, such as motor-driven continuous lift designs. Expect the controller to stop adjusting lift, with weaker pull and higher consumption; P264D is the high-side counterpart.
- What you may notice
- MIL on
- Weaker pull, lift no longer varied
- Higher fuel consumption
- Likely causes
- LikelySignal wire shorted to ground
- Possible5 V sensor supply missing
- PossiblePosition sensor failed internally
- 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 – €600
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.