Input/Turbine Speed Sensor Circuit Malfunction
The P0715 code means the vehicle's onboard diagnostic system has detected: Input/Turbine Speed Sensor Circuit Malfunction. This is a serious severity code.
- Keep driving?
- Limited driving only
- DIY difficulty
- medium
- Estimated cost
- $20-$80 for speed sensor; $100-$200 labor
Read and clear transmission codes. Many trans codes are caused by low or burnt fluid -- check level and color before assuming the worst.
Basic scanners only read engine codes. This reads transmission, ABS, and airbag too.
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Common Symptoms
- Harsh or erratic transmission shifting
- Transmission stuck in one gear
- Check Engine Light on
- Speedometer may be affected
Probable Causes (Ranked by Likelihood)
- Failed input shaft speed sensor Very High
- Damaged wiring or connector at input speed sensor Moderate
- Metal debris on sensor tip (from transmission wear) Moderate
Common Fixes by Vehicle
What techs usually find when diagnosing P0715 on specific vehicles — tap your vehicle for the fix and the exact part:
2003-2015 Nissan Altima/Maxima CVT Moderate DIY
The input speed sensor (turbine speed sensor) on Nissan CVTs fails from heat and ATF contamination. Located on the transmission housing, it is accessible from under the car. Replace with an OE-quality Nissan unit OEM 31935-1XF01. Drain some CVT fluid first to reduce spillage during sensor removal. Confirm the exact part for your year and engine with a retailer's fitment lookup or your VIN before ordering - these applications split by engine and build date.
Labor: 0.5-1 hour2001-2011 Honda Accord/Civic Automatic Easy DIY
The mainshaft (input) speed sensor on Honda automatics develops cracked housings that allow fluid to reach the connector. Check for ATF in the electrical connector. Replace the sensor with Dorman and clean the connector. The sensor is on the top of the transmission, accessible from the engine bay. Confirm the exact part for your year and engine with a retailer's fitment lookup or your VIN before ordering - these applications split by engine and build date.
Labor: 0.5-1 hour2007-2017 Jeep Wrangler/Grand Cherokee 42RLE/545RFE Moderate DIY
The input speed sensor on Chrysler transmissions fails from internal seal degradation. ATF leaks past the sensor O-ring. Replace the sensor and the O-ring together. Located on the driver side of the transmission. Use Mopar for correct fitment. Torque to 105 in-lbs. Confirm the exact part for your year and engine with a retailer's fitment lookup or your VIN before ordering - these applications split by engine and build date.
Labor: 0.5-1 hourFrequently Asked Questions
What does the input speed sensor do?
The input (turbine) speed sensor measures the rotational speed of the torque converter turbine, which is the input shaft of the transmission. The TCM uses this to determine slip, torque converter lockup timing, and shift points.
Mechanics Guide Step-by-step diagnosis
Step-by-Step Diagnostic Procedure
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Monitor input shaft speed on a scan tool. At idle in drive with brakes applied, input speed should be near zero. Erratic readings indicate sensor or wiring issues.
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Test sensor resistance: 200-900 ohms for magnetic sensors.
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Remove the sensor and inspect the tip for metal shavings. Contamination can cause erratic readings.
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Inspect sensor wiring harness for damage at the transmission connector.
Sources 1
This page is built from documented references. Verify against your own service info before repair work.
- SAE J2012Diagnostic Trouble Code Definitions (defines the generic OBD-II code ranges)
Commonly Affected Vehicles
- Dodge Ram and Caravan (very common on 45RFE transmissions)
- Jeep Grand Cherokee
- Ford F-150 and Explorer (5R55 transmission)
- Chevrolet Silverado
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