* Faulty Crash Sensor: These sensors detect impact and trigger airbag deployment. A malfunctioning sensor can trigger the light even without a crash or could fail to deploy the airbags in an actual accident.
* Problems with the Airbag Control Module (ACM): This is the "brain" of the system. A faulty ACM can cause a wide range of issues, including the airbag light illuminating. This is often the most expensive repair.
* Wiring Issues: Damaged, corroded, or loose wiring anywhere in the airbag system can cause the light to come on. This can be due to age, rodent damage, or previous repairs.
* Faulty Airbag(s): A problem with the airbag itself, such as a damaged inflator or internal component, can activate the warning light.
* Seatbelt Pretensioner Malfunction: These devices tighten seatbelts in a crash. A problem with them can also trigger the light.
* Low Battery Voltage: In some cases, a low battery voltage can cause the light to illuminate, but usually only temporarily.
* Clock Spring Failure: The clock spring is located in the steering column and allows the airbag system to communicate with the steering wheel.
* Incorrect Installation of Aftermarket Parts: Installing certain aftermarket parts incorrectly can interfere with the airbag system and illuminate the light.
It's impossible to diagnose the specific problem without a proper diagnostic scan. A mechanic with a scan tool capable of reading airbag system codes can pinpoint the exact cause. Ignoring the light is incredibly dangerous; a malfunctioning airbag system could fail to deploy in an accident, leading to serious injury or death.
