P0715Input/Turbine Speed Sensor "A" Circuit
What it means
The transmission control sees no usable signal from the input (turbine) speed sensor.
Symptoms
- Harsh, late or missing shifts
- Transmission in limp mode (stuck in one gear)
- Gearbox or check engine warning light
Common causes
- Faulty input speed sensor
- Wiring or connector fault
- Metal debris on the sensor
What to check first
- Compare input speed with engine speed in live data
- Check the sensor wiring and resistance
- Check the fluid for debris
Generic OBD-II meaning. Manufacturer-specific meanings and checks can differ; always check the service information for the car.