The airbag light, also called the supplemental restraint system light, turns on when there is a problem with one of the components of the safety system. It warns the driver that the safety system needs to be inspected as the light disables the airbag from operating.
There are three common causes that force the airbag light to turn on. The first one occurs when the back-up battery used for the safety system is depleted and needs to be recharged. After installing a new battery in the vehicle, reset the code with a diagnostic machine.
Another example is when the airbag clock spring needs replacing. Finally, a wet airbag module can be an issue. The airbag module is generally located under the front driver seat. When it gets wet, the unit will malfunction and need to be replaced.