P0715: Input/turbine speed sensor: circuit fault
The control unit is not getting a valid signal from the sensor that measures rotation at the automatic gearbox input; usually the sensor or wiring.
| Code | P0715 |
|---|---|
| System | Engine and transmission |
| Group | P07xx, Transmission |
| Type | Generic: it means the same on every make |
| Can you keep driving? | With care |
What P0715 means
The input (or turbine) speed sensor measures how fast the shaft going into the automatic gearbox is turning. By comparing it with engine speed and output speed, the control unit knows which gear is engaged, whether anything is slipping and when to shift. This code indicates a general electrical fault in its circuit.
Most common causes
- Sensor or gearbox connector loose, corroded or oily
- Damaged sensor wiring
- Metal particles stuck to the sensor tip
- Faulty sensor
- Transmission control unit fault (uncommon)
Symptoms
- Engine or gearbox warning light on
- Harsh or badly timed shifts
- Gearbox stuck in one gear (limp mode)
- Engine revving up during shifts
Can you drive with P0715?
With care You can drive with care, but the gearbox usually locks into one gear and acceleration suffers. Get it to a garage soon and avoid long trips like this.
Open the bonnetthe in-depth explanation
How to check it
Check on the scanner whether output speed or gear ratio codes are stored too: if only this one appears, start with its connector and wiring. If your car has a gearbox dipstick, check the oil level as well.
How to read and clear P0715 with Final OBD
Plug an OBD2 scanner in under the steering wheel, switch the ignition on and open Final OBD. Under Faults you’ll see P0715 with its description and whether it’s confirmed, pending or permanent.
This code is usually stored by the gearbox control unit. If the car reports it over standard OBD, you read it for nothing with FREE; to read it straight from the gearbox control unit, with its description and clearing, you need PRO.
Clearing the code only turns the light off: if the cause is still there, it comes back. Clear it once it’s fixed, and not right before an inspection. It’s all in how to read and clear fault codes and in inspections and OBD.
Similar codes
- P0711 Transmission fluid temperature sensor: range/performance
- P0712 Transmission fluid temperature sensor: circuit low
- P0713 Transmission fluid temperature sensor: circuit high
- P0714 Transmission fluid temperature sensor: circuit intermittent
- P0716 Input/turbine speed sensor: range/performance
- P0717 Input/turbine speed sensor: no signal
- P0718 The gearbox turbine shaft speed sensor circuit fails intermittently
- P0719 The brake switch B circuit has a low signal
- P0700 Transmission control system: fault detected
- P0701 Transmission control system: range/performance
- P0702 Transmission control system: electrical fault
- P0703 Torque converter/brake switch B: circuit fault
To understand it properly
We explain how that system works, with drawings and no waffle, in our mechanics guide: Automatic gearbox.
What does code P0715 mean?
The input (or turbine) speed sensor measures how fast the shaft going into the automatic gearbox is turning. By comparing it with engine speed and output speed, the control unit knows which gear is engaged, whether anything is slipping and when to shift. This code indicates a general electrical fault in its circuit.
Can you drive with P0715?
You can drive with care, but the gearbox usually locks into one gear and acceleration suffers. Get it to a garage soon and avoid long trips like this.
How do you clear P0715?
With an OBD2 scanner and an app like Final OBD, which clears it for free if it’s stored by the engine control unit. But clearing it only turns the light off: if the cause isn’t fixed, P0715 comes back.
Read it on your car
Final OBD reads and clears engine faults through standard OBD for free, each one explained in plain English. With PRO it also reads the faults of every control unit, each make’s own codes included, and clears them in all of them.
