OBD-II · Engine and powertrain (P)
P0715
Input/turbine shaft speed sensor A circuit
What it means
The signal from the gearbox input (turbine) speed sensor is missing or invalid.
Symptoms
- gearbox warning light or engine warning light
- harsh, delayed or no gear changes
- limp mode, stuck in one gear
Likely causes, most likely first
| No. | Cause |
|---|---|
| 01 | failed input speed sensor (often built into the mechatronic unit) |
| 02 | wiring or connector fault |
| 03 | fluid leaking into the connector |
| 04 | debris on the sensor |
What to check, step by step
- 01Read all transmission codes and check the fluid level and condition
- 02Inspect the gearbox connector for fluid, corrosion and bent pins
- 03Check the sensor signal in live data while driving
- 04Replace the sensor or repair the mechatronic unit if the sensor is built in