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P0742high severityPowertrain

Torque Converter Clutch Circuit Stuck On

on 2015 Kia Forte 1.8L I4 · FWD

What this code means

The TCC is not releasing when it should, causing the engine to stall or shudder at low speeds.

Symptoms

  • Stalling when coming to a stop
  • Shudder at low speed
  • Vehicle lunging at stops
  • Check Engine Light

Common causes

  • TCC solenoid stuck on
  • Valve body issue
  • Wiring short keeping solenoid energized

Diagnostic steps

  1. Monitor TCC engagement state
  2. Test solenoid
  3. Check valve body
  4. Check wiring for shorts

Repair notes

Replace TCC solenoid. Driving with TCC stuck on causes stalling.

Other Powertrain codes on this vehicle

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