Zoeken
U0172
Systeem
Network (CAN Bus)
Scanner vereist
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.

Veelvoorkomende symptomen

  • Passenger airbag off light
  • Airbag light on

Typische oorzaken

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

Welke scanner heb je nodig?

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

Gebruik live data en freeze frame voordat je onderdelen vervangt. ABS-, SRS- en U-codes vereisen meestal een full-system scanner.

Diagnosetips

  • Leg freeze frame vast wanneer de code voor het eerst verschijnt
  • Wis de code pas na het oplossen van de oorzaak
  • Controleer op gerelateerde pending codes
  • Controleer of accuspanning boven 12,4 V is voordat je sensoren suspecteert

Aanbevolen TOPDON scanners

Veelgestelde vragen

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.