Szukaj
B1121
System
Supplemental Restraint (Airbag)
Wymagany skaner
Full-system scanner (engine, ABS, SRS, transmission, service resets)

Driver Airbag Squib 2 Circuit

Understand B1121, common causes, and the right TOPDON scanner to diagnose it.

Second squib circuit for dual-stage driver airbag.

Typowe objawy

  • Airbag light on

Typowe przyczyny

  • Dual-stage bag module fault
  • Clock spring secondary circuit
  • Connector under column

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 B1121 mean?
B1121 indicates driver airbag squib 2 circuit. Second squib circuit for dual-stage driver airbag.
Can I diagnose B1121 with a basic code reader?
B1121 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 B1121?
Full-system scanner (engine, ABS, SRS, transmission, service resets) See recommended tools on this page.
Is it safe to drive with B1121?
It depends on the code and symptoms. Flashing check engine lights and misfire codes should be addressed immediately. Consult a professional if unsure.