Suche
U0172
System
Network (CAN Bus)
Benötigter Scanner
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.

Häufige Symptome

  • Passenger airbag off light
  • Airbag light on

Typische Ursachen

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

Welchen Scanner brauchen Sie?

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

Nutzen Sie Live-Daten und Freeze Frame, bevor Sie Teile tauschen. ABS-, SRS- und U-Codes erfordern meist einen Vollsystem-Scanner.

Diagnose-Tipps

  • Freeze Frame erfassen, wenn der Code erstmals gesetzt wird
  • Code erst nach Behebung der Ursache löschen
  • Auf verwandte pending codes prüfen
  • Batteriespannung über 12,4 V prüfen, bevor Sie Sensoren verdächtigen

Empfohlene TOPDON Scanner

Häufig gestellte Fragen

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.