P264B"A" Rocker Arm Actuator Position Sensor Circuit Range/Performance (Bank 1)
- 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
- Range/Performance means the bank 1 feedback sensor for actuator A delivers a signal inside its electrical limits that still does not fit what the engine expects, for example a position that lags or overshoots the commanded one, or that fails to move when the actuator is driven. CARB requires valve lift systems to catch target errors and slow response before emissions exceed set limits. No manufacturer documents P264B publicly; the closest documented case is Toyota's P265B on Valvematic engines (2014 Corolla, 2018–19 C-HR, 2020 Corolla), cured by ECM reprogramming or a new continuously variable lift controller. Worn linkage, a loose sensor, or a dragging actuator are plausible causes.
- What you may notice
- MIL on after a drive cycle
- Hesitation or uneven power delivery
- Idle speed fluctuating
- Likely causes
- PossibleActuator or linkage moving sluggishly
- PossibleSensor loose or misaligned on its mount
- RareControl software needing 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 – €1,200
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.