B1055Body
Seat belt buckle switch circuit malfunction
Where to start
The seat belt buckle switch circuit. The most harmless fault in this row: usually a connector under the seat, unplugged or disturbed while cleaning the interior or fitting covers. But the buckle takes part in the pretensioner's logic, so it should not be left.
A code is not a diagnosis. It says which check failed, not which part to replace. Clearing it without repair only means the car will report it again in a few trips.
How to put together a report a mechanic will actually read
We have a detailed piece on thisWhy a scanner does not show ABS, airbag and gearbox faults
How the code is built
Letter — the systemBody: lights, climate, airbags
Common or the maker's ownManufacturer code: meaning depends on the make
Number of the faultThe serial number inside that group — it does not say how serious the fault is
All codes in «Body, airbags and lighting»
How the app helps
CarScan reads this code from your car through an OBD-II adapter, shows whether it is active now or only stored, names the module that reported it, and puts it into a plain-text report for your mechanic.