B1B1A fault code: what it means

B1B1A: Left curtain airbag circuit open. Airbag light on.

Body · Costly if missed

Usual causes, most likely first

1. connector in roof or pillar
2. harness fault
3. curtain airbag module

B1B1A by make

What the repair usually costs

• Airbag / SRS warning light diagnosisNZ$70–NZ$210 · A$80–A$230
• Airbag clock spring (spiral cable) replaceNZ$220–NZ$670 · A$230–A$640

Not sure what B1B1A means on your car? Ask Credov.

Before you clear it

Write the code down or photograph the scanner first. A code that comes straight back after clearing points to a fault that is still there. A car whose codes were cleared just before you arrived may be hiding one: the scanner's readiness monitors show "not ready" for a while after codes are cleared.

Researched by Credov from manufacturer and workshop sources. A fault code points to where a fault may be; a workshop confirms it with a diagnosis. Browse all fault codes.