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Why is the airbag indicator light constantly on in a car?

3 Answers
ReedLynn
07/29/25 1:49pm
Reasons for the airbag indicator light staying on in a car: 1. Instrument self-check: When entering the vehicle and starting the ignition, the instrument panel performs an automatic check. The airbag light will automatically turn off after the self-check is completed, which usually takes about 5 seconds and is a normal phenomenon. If the airbag light remains on for a long time after the self-check, it can be determined that there is a genuine fault. 2. False fault: If the battery is low on power, it can also cause the airbag light to illuminate. Additionally, the airbag system may feedback a signal indicating low pressure in a specific airbag, generating a fault code. In this case, simply clearing the fault code will resolve the issue. 3. Genuine fault: If the above two reasons are ruled out, it may indicate a wiring fault, which should be repaired promptly. Possible causes of this fault could include issues with the airbag itself, collision sensors, airbag clock spring, or other wiring-related problems.
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VanCamilla
08/13/25 5:09am
I've been driving for over 20 years and have seen the airbag light come on quite often, usually indicating an issue with the safety system. The most common causes are faulty sensors under the seats or poor contact in the airbag wiring harness, such as oxidized or disconnected connectors. A malfunctioning crash sensor can also trigger it, especially if the car was involved in a minor accident that wasn't properly reset. Problems with the control module are also common and require a diagnostic tool to read the codes. Never ignore it, as a faulty airbag might not deploy in an accident, posing a significant risk. I recommend starting with the basics: check the relevant fuses in the fuse box to ensure they're not blown. If the light stays on, take your car to a professional repair shop immediately for a thorough inspection with proper equipment—don't compromise on safety. My old car used to have a constantly flashing light due to loose wiring from rough driving, and getting it fixed gave me peace of mind.
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ZoeFitz
10/10/25 5:28am
As a new driver, I do panic when the airbag light comes on. This warning light indicates a fault in the airbag system, such as sensor signal loss or wiring short circuits. Potential causes include malfunctioning occupant sensors in front seats, damaged spiral cables in the steering wheel airbag, or unstable power supply to the control unit. Even interior modifications like seat cushion replacements might trigger it. Safety-wise, when the light's on, airbags may not deploy during collisions, which is genuinely hazardous. My approach is to immediately pull over to check dashboard messages, but never attempt DIY repairs on airbag components due to electrocution risks. Drive straight to a 4S shop or auto repair center – their diagnostic tools can quickly pinpoint the issue. Only resume driving after proper repairs for peace of mind.
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