B11E0: Rollover Deployment History

Stored crash data

What B11E0 means

Airbag control units keep history for events they judge severe enough to act on. B11E0 is the rollover entry in that history. It does not describe a circuit problem or a failing part, it states that the module already responded to a rollover and wrote the result into protected memory.

History entries are permanent by design. Battery disconnects leave them alone and scan tools cannot erase them, which is exactly the behavior the system needs. It also means a control unit carrying this record will keep the light on in any car it is installed in until it is properly cleared.

Common causes

• A rollover event the control unit recognized and recorded
• Curtain airbags and pretensioners deployed during that rollover
• A used control unit installed from a vehicle that had rolled
• A module reinstalled after repairs without the stored history being cleared
• Restraints fired during salvage handling and recorded by the module

Crash data or hardware fault?

This entry is stored crash data, which is the category where our mail-in reset is the fix rather than a workaround. Live circuit codes behave in the opposite way. They follow a resistance or continuity reading, they change as soon as the wiring changes, and they clear themselves once the fault is repaired.

Does our reset clear it?

A mail-in module reset is what removes B11E0, after the vehicle repairs are finished. Replace every restraint that deployed in the rollover, repair the wiring that was damaged, and verify the sensors in the affected areas. Then pull the control unit and send it to us. We clear the stored history and return the module so it can go back in and arm normally.

Which makes throw it

Subaru stores B11E0 as rollover deployment history. It sits in the same group as the other B11F entries that record front and side deployments, and a rolled car often carries several of them at once.

What to do next

Scan the module for the complete list of stored deployment records before planning the repair, since a rollover commonly fires curtains and pretensioners together and each one shows up separately. Replace all of them with genuine OEM parts and check the roof rail harness where the curtains tore out. Ship the control unit to us once the car is complete, and call 501-988-0611 with parts questions. Related codes: B1149, B11F0, B1787.