P0742 – Torque Converter Clutch Stuck On

Description

The ECM detects the torque converter clutch stuck engaged.

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Symptoms

  • Stalling
  • Harsh shifting
  • Limp mode

Causes

  • Stuck solenoid
  • Valve body issues
  • Wiring faults

Diagnosis

  • Monitor TCC command
  • Inspect wiring
  • Check solenoid

Repair

  • Replace solenoid
  • Repair wiring
  • Service valve body