OBD-II diagnostic trouble code
P0715Caution
Input/Turbine Speed Sensor Circuit Malfunction
This sensor measures how fast the transmission's input shaft is spinning, which the TCM uses (together with the output/vehicle speed sensor) to calculate what gear the transmission should be in. A faulty signal here confuses the shift logic even if the transmission's mechanical parts are fine.
Symptoms
- Harsh, delayed, or erratic shifting
- Transmission may enter limp mode, restricting it to one gear
- Shift flare — RPM briefly spikes during a shift before the next gear engages
- Transmission warning light on
Likely causes
- Failed input/turbine speed sensor
- Damaged or corroded wiring/connector, often from transmission fluid contamination at the connector
- Debris or metal shavings on the sensor tip from internal transmission wear
How to diagnose it
- Check the sensor's wiring and connector for fluid contamination or damage
- Compare the sensor's live signal against the output speed sensor with a scan tool while driving
- If accessible, inspect the sensor tip for metal debris, which can also hint at broader internal wear
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Code names are compiled from open/standardized SAE and ISO references. Explanations, symptoms, causes and fixes are original. Covers generic (P0/C0/B0/U0) codes only — manufacturer-specific codes are planned for a future update.
Frequently asked questions
Can I drive with P0715?
You can usually keep driving with P0715, but don't put it off — the underlying cause can get worse or lead to further damage the longer it goes unaddressed. Get it diagnosed as soon as you reasonably can.
How much does it cost to fix P0715?
Typical repair costs for {code} range from roughly 80 to 350 EUR, depending on the specific cause and your car — see the fixes listed above for a breakdown.
What causes P0715?
Failed input/turbine speed sensor Damaged or corroded wiring/connector, often from transmission fluid contamination at the connector Debris or metal shavings on the sensor tip from internal transmission wear
Reviewed by Artyom SemenovAutomotive Editor · Fact-checked by Yauheni Kapliarchuk, Editor-in-Chief