For a 2016–2025 Honda Civic, dealing with a "Check Airbag System" or SRS light depends entirely on whether the vehicle has been in an accident.If the Car Was in an Accident (Crash Airbag)When an airbag or seat belt pre-tensioner deploys, the Supplemental Restraint System (SRS) module locks itself. It stores hard crash data and Diagnostic Trouble Codes (DTCs) that standard OBD2 scanners cannot clear.The System Lock: On newer 11th-generation Civics (2022–2025), a crash triggers a permanent fault code. You cannot clear standard codes until the actual crash data is completely erased from the module's memory.Hardware Replacement: You must first replace all deployed airbags, impact sensors, and locked seat belt pre-tensioners. Note that 2022–2025 models also feature rear seat belt pre-tensioners that require replacement