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P1742 – Torque Converter Clutch Solenoid Stuck On

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Symptoms

  • Stalling
  • Harsh shifting

Causes

  • Solenoid stuck
  • Valve body issue
  • ECU fault

Diagnosis

  • Command solenoid
  • Inspect wiring
  • Scan ECU

Repair

  • Replace solenoid
  • Service valve body
  • Update ECU
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