This light comes on briefly when you turn on the ignition, with the engine not running, as a check to show you it is working.

It should go out when the engine starts. If it stays on, or comes on while you are driving, you may have a problem with the electrical charging system. It could indicate that you have a loose generator drive belt or another electrical problem. Have it checked right away. Driving while this light is on could drain your battery.

If you must drive a short distance with the charging system light on, be certain to turn off all your accessories, such as the radio and air conditioner.