* Faulty Crash Sensor: These sensors detect impacts and trigger airbag deployment. A malfunctioning sensor can cause the light to stay on.
* Problems with the Airbag Control Module (ACM): The ACM is the "brain" of the system. A faulty ACM, damaged wiring to the ACM, or even low voltage can cause the light to illuminate. This is often the most expensive repair.
* Wiring Issues: Damaged, corroded, or loose wiring anywhere in the airbag system can trigger the light. This could be from a previous accident, rodent damage, or simply age and wear.
* Faulty Airbag(s): While less common, a problem with the airbags themselves (though rare) can cause the light to remain on.
* Faulty Seat Belt Buckle Switch: These switches tell the system if the seatbelts are fastened, influencing airbag deployment. A faulty switch can trigger the light.
* Faulty Occupant Sensor: Some Impalas have sensors that detect if a passenger is in the seat. A malfunction in this sensor can cause the light to stay on.
* Low Battery Voltage: In some cases, consistently low battery voltage can cause the light to stay on as the system is unable to properly self-diagnose.
You should NOT ignore this light. Driving with the airbag light on means your airbags may not deploy in a collision, significantly increasing your risk of injury.
What to do:
* Don't attempt DIY repairs. The airbag system is complex and high-voltage. Improper repair attempts can be dangerous.
* Take your Impala to a qualified mechanic or dealership. They have the diagnostic tools to pinpoint the exact problem and safely repair it. They'll use a scan tool to read the diagnostic trouble codes (DTCs) stored by the ACM, providing a crucial clue as to the root cause.
Ignoring the airbag light is extremely risky. Get it checked immediately.
