P266B"A" Rocker Arm Actuator Position Sensor Circuit Range/Performance (Bank 2)
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- Needs a drive cycle to confirm a fix
- How the car detects it
- For bank 2, P266B means the position reported for actuator A is electrically valid but does not match what was commanded or changes too slowly. CARB expects variable lift monitors to notice when the commanded position is missed or reached too late, and a sensor whose reading drifts from the real actuator position defeats both. No manufacturer publishes P266B; on the bank 1 side Toyota's comparable experience with P265B on Valvematic engines ended in recalibration or a replaced lift controller, which illustrates that software and mechanics can both be at fault. Check sensor mounting, linkage wear and actuator movement on that bank before replacing parts.
- What you may notice
- MIL on after a drive cycle
- Uneven running between the banks
- Hesitation under load
- Likely causes
- PossibleBank 2 actuator or linkage binding
- PossibleSensor reading drifting from the true position
- RareControl software calling for an update
- 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: €100 – €1,300
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.