P2766Input/Turbine Shaft Speed Sensor B Circuit Range/Performance
- 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
- P2766 marks a sensor B signal that is present but erratic or implausible. Ford's 2012 strategy applies it to the DPS6 dual-clutch box, where sensor B reads input shaft 2. In Mitsubishi's 2022 CVT, sensor B is in fact the secondary pulley sensor on the output side: with the converter locked and engine, primary pulley and input speeds within 1,000 rpm of one another, a pulley ratio above 2.9 or below 0.3 for 5 s sets the code, two trips, MIL on. Infiniti bulletin ITB20-027 for the 2019 QX50 CVT covers a permanent P2766, among other transmission codes, that will not clear after the prescribed procedure; the fix is a new TCM. Erratic signals point to a dirty sensor, interference, or a loose fit.
- What you may notice
- Check engine light after two drives
- Sluggish acceleration, manual mode unavailable
- Torque converter lock-up disabled
- Likely causes
- LikelySensor B fouled with metal debris or not seated firmly
- PossibleInterference or poor ground on the signal circuit
- RareTCM fault keeping the code stored permanently
- 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: €120 – €2,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.