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Why is the airbag light on in a sedan?

1 Answers

WestonFitz

07/30/25 6:38am

The reasons for the airbag light being on: 1. Normal self-test illumination. Every time the ignition switch is turned on, various indicator lights on the instrument cluster will light up. If there is a system issue, the indicator will remain lit; if there is no problem, it will automatically turn off. 2. During vehicle use, if the airbag light suddenly comes on, the most common cause is a loose connection in the airbag wiring harness plug located on the side of the seat. The plug is positioned under the seat, and frequent seat adjustments can cause the plug to occasionally disconnect. Another possible reason is issues with various sensors in the airbag system or problems with the airbag control unit. 3. After disassembling certain parts of the vehicle, if the ignition switch is turned on before the airbag system components are properly reinstalled, the airbag control unit will record a fault code, causing the airbag light to illuminate. In this case, after proper installation, simply clear the fault code.

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