Zoeken
B0021
Systeem
Supplemental Restraint (Airbag)
Scanner vereist
Full-system scanner (engine, ABS, SRS, transmission, service resets)

Side Airbag Deployment Control — Passenger Side

Understand B0021, common causes, and the right TOPDON scanner to diagnose it.

Passenger side airbag circuit malfunction.

Veelvoorkomende symptomen

  • SRS light on

Typische oorzaken

  • Passenger seat side bag module
  • Wiring in B-pillar
  • Connector under seat

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 B0021 mean?
B0021 indicates side airbag deployment control — passenger side. Passenger side airbag circuit malfunction.
Can I diagnose B0021 with a basic code reader?
B0021 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 B0021?
Full-system scanner (engine, ABS, SRS, transmission, service resets) See recommended tools on this page.
Is it safe to drive with B0021?
It depends on the code and symptoms. Flashing check engine lights and misfire codes should be addressed immediately. Consult a professional if unsure.