OBD codes / P0715
P0715
SeriousInput/Turbine Speed Sensor Circuit Malfunction
Treat P0715 with some urgency. It often causes harsh shifting or limp mode, which is drivable gently and briefly but not ideal for long trips or towing. Check the fluid level, and get it diagnosed before driving far so erratic shifting doesn't add wear.
What this code means
The input (turbine) speed sensor tells the transmission computer how fast the input shaft is spinning, which it compares to engine and output speed to time shifts and lock the torque converter. P0715 means that signal is missing or erratic. Common causes are a failed sensor, wiring/connector trouble, or low/dirty transmission fluid affecting the sensor. Without a good input-speed signal the transmission can shift harshly, erratically, or default to a safe mode, so it's worth addressing.
Symptoms you might notice
- Harsh, erratic, or delayed shifting
- Transmission stuck in one gear (limp mode)
- No torque-converter lockup (higher cruise RPM)
- Speedometer issues on some vehicles
- Check-engine light
What it costs to fix
Typical range: $120–$600 · about ~0.5–4 hrs of labor
| If the cause is… | Part | Labor |
|---|---|---|
| Input/turbine speed sensor | $30–$150 | ~0.5–4 hrs |
| Wiring / connector repair | $10–$120 | ~0.5–1.5 hrs |
| Transmission fluid service | $80–$250 | ~0.5–1.5 hrs |
The sensor part is cheap; labor is the variable. On some transmissions the sensor is external and quick to reach; on others it's inside and the pan (or more) has to come off, which raises the cost considerably.
The price swings on which cause it turns out to be — so confirm the cause before paying. Diagnose P0715 for my exact vehicle →
Frequently asked
Can I drive with P0715?
Carefully and not far. Harsh shifting or limp mode is usually drivable to a shop, but it's hard on the transmission over time. Check the fluid level and get it diagnosed rather than driving on it for long.
What does the input speed sensor do?
It measures how fast the transmission's input (turbine) shaft spins. The computer compares that to engine and output speed to time gear changes and lock the torque converter — so a bad reading throws shifting off.
Is low transmission fluid a cause of P0715?
It can contribute — low or dirty fluid affects sensors and shifting. Checking the fluid level and condition is a cheap, sensible first step before replacing the sensor.
How much does it cost to fix P0715?
The sensor is inexpensive; the bill depends on whether it's external (cheap) or internal (the pan or more must come off). A fluid service is modest. Diagnosis determines the labor involved.
Seeing P0715 on your car? Get a diagnosis specific to your exact year, make and model.
Diagnose P0715 for my vehicleGeneric OBD-II reference. Manufacturer-specific behavior varies — confirm with a scan tool and, for safety-related codes, a professional inspection.