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U0172
Sistema
Network (CAN Bus)
Scanner richiesto
Full-system scanner (engine, ABS, SRS, transmission, service resets)

Lost Communication with Restraints Occupant Classification Module

Understand U0172, common causes, and the right TOPDON scanner to diagnose it.

Occupant classification sensor module offline — passenger airbag status unknown.

Sintomi comuni

  • Passenger airbag off light
  • Airbag light on

Cause tipiche

  • Failed OCS mat in passenger seat
  • Connector under seat unplugged
  • CAN wiring

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 U0172 mean?
U0172 indicates lost communication with restraints occupant classification module. Occupant classification sensor module offline — passenger airbag status unknown.
Can I diagnose U0172 with a basic code reader?
U0172 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 U0172?
Full-system scanner (engine, ABS, SRS, transmission, service resets) See recommended tools on this page.
Is it safe to drive with U0172?
It depends on the code and symptoms. Flashing check engine lights and misfire codes should be addressed immediately. Consult a professional if unsure.