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B1651
Systeem
Supplemental Restraint (Airbag)
Scanner vereist
Full-system scanner (engine, ABS, SRS, transmission, service resets)

Occupant Classification System Not Learned

Understand B1651, common causes, and the right TOPDON scanner to diagnose it.

OCS zero-point or calibration not completed after service.

Veelvoorkomende symptomen

  • Passenger airbag always off
  • Airbag light on

Typische oorzaken

  • Seat service without calibration
  • New OCS mat not programmed
  • Battery disconnect sequence skipped

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 B1651 mean?
B1651 indicates occupant classification system not learned. OCS zero-point or calibration not completed after service.
Can I diagnose B1651 with a basic code reader?
B1651 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 B1651?
Full-system scanner (engine, ABS, SRS, transmission, service resets) See recommended tools on this page.
Is it safe to drive with B1651?
It depends on the code and symptoms. Flashing check engine lights and misfire codes should be addressed immediately. Consult a professional if unsure.