P0715
Input/Turbine Speed Sensor Circuit Malfunction
The transmission input speed sensor is not providing a valid signal.
The input speed sensor monitors the rotational speed of the torque converter turbine or transmission input shaft. The TCM uses this data along with the output speed sensor to calculate gear ratios and control shift timing.
Symptoms
Common Causes
Failed input speed sensor
HIGHSensor has failed electrically.
Damaged connector or wiring
MEDIUMWire damage or corroded connector.
Metallic debris on sensor
MEDIUMMetal particles from clutch wear interfere with the magnetic sensor.
Step-by-Step Diagnosis
Check sensor resistance
mediumMeasure resistance across sensor terminals. Should typically be 200-1000Ω.
Inspect connector
mediumCheck for ATF contamination, corrosion, or bent pins.
Replace sensor
mediumReplace the input speed sensor. Some are accessible externally, others require pan removal.
Frequently Asked Questions
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