OBD-II code · Powertrain (generic, extended)
P2766 Input/Turbine Shaft Speed Sensor B Circuit Range/Performance
The second input shaft speed sensor reading is implausible against the primary sensor. Wiring faults of this kind typically come from chafing, water ingress at connector seals, or pin push-back — a wiggle test on the harness while the code is active often confirms the location.
Is it safe to drive with P2766?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyDamaged tone wheel teeth
- PossibleSensor air gap drift
- Less likelySensor element aged beyond calibration window
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1–5 h
- Emissions test
- Usually unaffected
- Parts involved
- Input Shaft Speed Sensor B, Tone Wheel
Related codes
- P2763Torque Converter Clutch Pressure Control Solenoid Control Circuit High
- P2764Torque Converter Clutch Pressure Control Solenoid Control Circuit Low
- P2765Input/Turbine Shaft Speed Sensor B Circuit
- P2767Input/Turbine Shaft Speed Sensor B Circuit No Signal
- P2768Input/Turbine Shaft Speed Sensor B Circuit Intermittent
- P2769Torque Converter Clutch Solenoid Circuit Low
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.