P05BB
Restraints Deployed
The restraint control module reports that one or more airbag or pretensioner stages have been deployed. The engine ECU latches this and runs the crash strategy - fuel cutoff, hazard lights, unlock central locking, disable cruise. The code can only be cleared after the restraint module is reset (typically requires module replacement).
- Check engine light: Yes
- Emissions related: No
- Repair difficulty: hard
Common causes
Ordered by how often each turns out to be the cause.
- Deployed after a crash eventCommon
Parts involved
- Restraint Control Module
- Airbag
- Seat Belt Pretensioner
P05BB is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.