P1702 – Transmission Range Sensor (Toyota)

Description

The ECM detected a malfunction in the transmission range sensor affecting gear position detection.

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Symptoms

  • Incorrect gear display
  • No start in gear
  • Harsh shifting
  • Failsafe mode
  • Check engine light

Causes

  • Faulty range sensor
  • Misadjusted sensor
  • Damaged wiring
  • Connector corrosion
  • TCM signal fault

Diagnosis

  • Check sensor alignment
  • Inspect wiring
  • Test sensor output
  • Scan TCM data
  • Check connectors

Repair

  • Adjust range sensor
  • Repair wiring
  • Replace sensor
  • Clean connectors

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