P1705 – Throttle Position Sensor (AT) (Toyota)

Description

The ECM detected an abnormal throttle position sensor signal affecting automatic transmission shift control.

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Symptoms

  • Harsh shifting
  • Delayed shifting
  • Poor acceleration
  • Hesitation
  • Check engine light

Causes

  • Faulty TPS sensor
  • Wiring issues
  • Connector corrosion
  • Throttle body wear
  • TCM signal error

Diagnosis

  • Test TPS sensor
  • Inspect wiring
  • Check connectors
  • Scan live data
  • Inspect throttle body

Repair

  • Replace TPS sensor
  • Repair wiring
  • Clean connectors
  • Service throttle body

Related Problems

Related Fault Codes