B1025Body
Seat belt pretensioner circuit malfunction
Where to start
The seat belt pretensioner circuit. The same unit as the airbags, and the same caution. ⚠️ While this code is present the pretensioner may not fire in a crash — this is not «a light is on», it is protection switched off.
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.