Your vehicle has an engine coolant temperature gage. With the ignition to ON, this gage shows the engine coolant temperature.
If the gage pointer moves into the red area, your engine is too hot. It means that your engine coolant has overheated.
If you have been operating your vehicle under normal driving conditions, you should pull off the road, stop your vehicle and turn off the engine as soon as possible.
See Engine Overheating .