P0715 Ford F-150
Input/Turbine Speed Sensor Circuit Malfunction · Powertrain Code · High
What is P0715?
The transmission input speed sensor is not providing a valid signal.
When the Ford F-150 triggers code P0715 (input/turbine speed sensor circuit malfunction), it typically points to an issue in the powertrain system. This is a high severity code, so address it promptly to avoid further damage or safety concerns. Below you'll find the most common causes, symptoms, and repair options specific to the Ford F-150.
Diagnostic data on this page is compiled from publicly available repair resources and technical service bulletins. Always have a qualified mechanic confirm the diagnosis before authorizing repairs on your Ford F-150.
Common Causes on Ford F-150
- Failed input/turbine speed sensor in the transmission
- Damaged wiring between the speed sensor and TCM
- Internal transmission damage affecting the input shaft speed signal
- Contaminated sensor from debris in degraded transmission fluid
Symptoms
- Check engine light
- Transmission shifts erratically or slips
- Speedometer may read incorrectly
- Transmission may go into limp mode
- Harsh or delayed shifts
Notes for Ford F-150
On the Ford 10R80 10-speed transmission, always use Motorcraft Mercon ULV fluid — using the wrong fluid causes shift quality issues.