This light will come on when you first start the vehicle as a check to let you know that the light is working.
It will go out after a few seconds. If the light does not come on, see your dealer.
If the light does not go out or if the light comes on and stays on while you are driving, your vehicle may have a problem with the cooling system. You should stop the vehicle and turn off the engine as soon as possible to avoid damage to the engine. A warning chime will also sound when this light is on.
See Engine Overheating for more information.