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Diagnose/P0717
P0717High SeverityTransmission

Input/Turbine Speed Sensor Circuit Low Input

What This Means

The transmission input speed sensor voltage is below minimum threshold. This sensor measures the rotational speed of the torque converter turbine shaft for gear ratio and shift timing calculations.

Common Symptoms

  • Erratic or harsh shifting
  • Speedometer malfunction
  • Transmission slipping
  • Check engine light and limp mode

Common Causes

  • Failed input speed sensor
  • Damaged tone ring
  • Wiring or connector issue
  • Metallic debris on sensor
  • Internal transmission damage

Estimated Repair Cost

$200 – $800
Parts and labor (varies by vehicle and location)
Difficulty:Advanced

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For informational purposes only. Diagnostic trouble codes are starting points for diagnosis, not definitive answers. Always consult a certified mechanic for proper diagnosis and repair. Estimated costs vary by vehicle, location, and shop rates.