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P0742
Sistema
Powertrain (Transmission)
Scanner richiesto
Full-system scanner (engine, ABS, SRS, transmission, service resets)

Torque Converter Clutch Circuit Stuck On

Understand P0742, common causes, and the right TOPDON scanner to diagnose it.

TCC stuck engaged — engine may stall at stops or shudder.

Sintomi comuni

  • Stalling when stopping
  • Shudder at low speed
  • Rough idle in gear

Cause tipiche

  • Stuck TCC solenoid
  • Valve body fault
  • Internal converter clutch welded

Di quale scanner hai bisogno?

Full-system scanner (engine, ABS, SRS, transmission, service resets)

Usa dati live e freeze frame prima di sostituire componenti. I codici ABS, SRS e U richiedono di solito uno scanner full-system.

Consigli diagnostici

  • Registra il freeze frame quando compare il codice
  • Cancella il codice solo dopo aver risolto la causa
  • Controlla codici pending correlati
  • Verifica che la batteria sia sopra 12,4 V prima di sospettare i sensori

Scanner TOPDON consigliati

Domande frequenti

What does P0742 mean?
P0742 indicates torque converter clutch circuit stuck on. TCC stuck engaged — engine may stall at stops or shudder.
Can I diagnose P0742 with a basic code reader?
P0742 may set in the engine module, but related diagnostics often benefit from an enhanced or full-system scanner with live data and freeze frame.
Which TOPDON scanner do I need for P0742?
Full-system scanner (engine, ABS, SRS, transmission, service resets) See recommended tools on this page.
Is it safe to drive with P0742?
It depends on the code and symptoms. Flashing check engine lights and misfire codes should be addressed immediately. Consult a professional if unsure.