You should immediately:
* Pull over safely as soon as possible. Driving with this light on could lead to a complete electrical failure, leaving you stranded and potentially causing an accident.
* Turn off the engine. Continuing to run the engine could worsen the problem.
* Check your owner's manual. While the light itself isn't specific, the manual might give some clues about potential causes.
* Have the vehicle towed to a qualified mechanic or dealership. They have diagnostic equipment to identify the exact cause of the problem. Attempting to diagnose and fix this yourself is generally not recommended due to the complexity of modern vehicle electrical systems.
Possible causes could range from a simple loose connection to a more serious issue with the alternator, battery, or other electrical components. Ignoring this warning light can lead to costly repairs down the road.