P265C"B" 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
- The angle or position sensor of rocker arm actuator B, bank 1, normally works inside a voltage band that never touches the lower rail. If the reading falls below that band, the engine controller logs P265C, because a value near zero cannot correspond to any real actuator position. Possible reasons are a signal conductor grounded through damaged insulation, a supply feed that has dropped out, or an internal sensor defect. CARB treats out-of-range low signals of valve lift inputs as circuit faults to be detected. No carmaker documents P265C publicly; Toyota's published Valvematic cases concern the B sensor's range code P265B only. Without trustworthy feedback the controller generally parks the lift in a safe position. High side: P265D; range fault: P265B.
- What you may notice
- MIL on
- Engine runs with fixed lift, less power
- Likely causes
- LikelySensor B signal wire grounded through damaged insulation
- PossibleSensor supply voltage missing
- PossibleInternal fault in position sensor B
- 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 – €1,200
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.