P05BBRestraints Deployed
- Generic OBD-II code · Powertrain
- Can trigger limp mode
- How the car detects it
- After a crash the restraint control module tells the engine module that airbags or belt tensioners have fired; the engine module then cuts the fuel pump (Ford: until the ignition is cycled) and possibly the engine. Depending on the maker the message travels over CAN and/or a dedicated wire with a defined level or voltage drop. P05BB is an event code: the engine module received a valid deployment message. The fuel pump is cut, the engine may stop, doors are unlocked by other modules, and Ford's engine module freezes recorded data. After a crash the restraint module must be replaced; a used module with a stored crash can also cause it. No manufacturer document available to us uses this code; it is a safety function, not an emission-relevant monitor, so usually without warning lamp.
- What you may notice
- Engine stops or will not start (fuel cut-off)
- Airbag warning light
- Doors unlocked, fuel cut-off message
- Likely causes
- LikelyReal accident with airbag or belt tensioner deployment
- RareDeployment after a hard underbody hit (e.g. off-road)
- RareFalse message from wiring or module fault
- RareUsed restraint module with stored crash fitted
- Repair
- Hard · Usually a job for a workshop.Typical cost: €500 – €3,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.