* Faulty Crash Sensor: These sensors detect impact and trigger airbag deployment. A malfunctioning sensor can cause the light to illuminate even without an accident.
* Problem with the Airbag Control Module (ACM): The ACM is the "brain" of the airbag system. Internal failures, damage from a power surge, or even corrosion can cause it to malfunction and trigger the light. This is often a costly repair.
* Faulty Airbag(s): A problem with the driver or passenger-side airbag itself (such as a damaged wiring harness or internal component) can activate the warning light.
* Faulty Seatbelt Pretensioner: These devices tighten seatbelts in a collision. A malfunctioning pretensioner can trigger the light.
* Faulty Clock Spring: Located in the steering column, the clock spring allows the airbag and other steering wheel controls to rotate with the wheel without damaging wiring. Wear and tear can cause issues.
* Loose or Damaged Wiring: Corrosion, rodent damage, or simply loose connections anywhere in the airbag system's wiring can cause the light to come on.
* Low Voltage: While less common, a low battery voltage can sometimes cause the light to illuminate.
* Incorrect Installation of Aftermarket Parts: Installing aftermarket accessories without correctly disconnecting the battery or taking necessary precautions can cause system faults.
It's crucial to have the airbag light diagnosed by a qualified mechanic. Ignoring the light is dangerous because it means the airbag system might not deploy properly in a crash. A mechanic will use a scan tool specifically designed for the SRS to identify the precise cause of the malfunction. Attempting DIY repairs on the airbag system is extremely risky and potentially dangerous.
