P1717 – Transmission Input Speed Sensor (Toyota)

Description

The ECM detected a malfunction in the transmission input speed sensor.

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Symptoms

  • Harsh shifting
  • Delayed shifting
  • Slipping
  • Incorrect speed reading
  • Check engine light

Causes

  • Faulty input speed sensor
  • Damaged wiring
  • Connector corrosion
  • Sensor contamination
  • TCM signal fault

Diagnosis

  • Test input speed sensor
  • Inspect wiring
  • Check connectors
  • Scan TCM data
  • Inspect sensor

Repair

  • Replace input speed sensor
  • Repair wiring
  • Clean connectors
  • Remove debris

Related Problems

Related Fault Codes