P0715
Input/Turbine Shaft Speed Sensor A Circuit
Transmission speed sensor
Generic OBD-II
High
What it means
P0715 means the transmission control module isn't getting a proper signal from the input/turbine shaft speed sensor, which reports how fast the transmission's input side is turning. Because the module uses this to time and control shifts, a fault typically causes harsh or erratic shifting and often forces the transmission into a limp (fail-safe) mode.
High
Can I keep driving? Drive gently and briefly — without turbine speed input the transmission often shifts harshly or locks into limp mode. Prolonged driving can add wear, so fix it promptly.
Common symptoms
What you'll notice
- Harsh, erratic, or delayed shifting
- Transmission stuck in one gear (limp mode)
- Speedometer or gear indicator issues on some vehicles
- Check-engine light on
Common causes
Most likely first
- Faulty input/turbine speed sensorLikely
- Sensor wiring or connector damaged, shorted, or corrodedCommon
- Metal debris on the sensor tip or reluctor ringCommon
- Poor electrical connectionLess often
- Faulty transmission control moduleLess often
How to diagnose & fix
Work through it in order
- Scan and confirm P0715, then read freeze-frame.
- Inspect the sensor connector and wiring for damage and corrosion.
- Remove and check the sensor for debris and the correct air gap.
- Measure the sensor's resistance/output against specification.
- Replace the sensor if faulty; verify the reluctor and TCM if the sensor is good.
FAQ
Quick answers
Is it safe to drive with P0715?+
Only briefly and gently — the transmission may limp or shift harshly without this signal, and extended driving can cause wear. Repair it soon.
Can I just clear P0715?+
It comes back as soon as the TCM loses the turbine speed signal again; the sensor or wiring must be repaired.
Related codes
Often seen with P0715
Read & clear P0715 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.
✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX