B0046: Left Curtain Deployment Loop Open
Standardized SAE J2012 code · B00xx — Restraints and airbags
Safety-critical system. Faults in airbags, brakes, steering or high-voltage components can put people at risk. Follow the manufacturer's service information and safety procedures, or have the vehicle checked by a qualified workshop.
What does B0046 mean?
An open circuit has been detected in the deployment loop of the left curtain (head) airbag. Curtain protection on the driver side will not deploy.
The code tells you which monitor failed, not which part is broken. Test before replacing parts.
Symptoms
- Warning light or symbol related to the affected system
- Comfort or safety function impaired
Common causes
- High Broken wire in headliner
- Medium Curtain airbag connector unseated
Likelihood is a general estimate across vehicles; your make and model may differ.
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