Szukaj
B0021
System
Supplemental Restraint (Airbag)
Wymagany skaner
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.

Typowe objawy

  • SRS light on

Typowe przyczyny

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

Jakiego skanera potrzebujesz?

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

Użyj danych na żywo i freeze frame przed wymianą części. Kody ABS, SRS i U zwykle wymagają skanera full-system.

Wskazówki diagnostyczne

  • Zapisz freeze frame, gdy pojawi się kod
  • Kasuj kod dopiero po usunięciu przyczyny
  • Sprawdź powiązane kody pending
  • Sprawdź, czy napięcie akumulatora jest powyżej 12,4 V przed podejrzeniem czujników

Polecane skanery TOPDON

Często zadawane pytania

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.