This red light comes on if the coolant level is below the minimum level or the engine is overheating. If this happens, you should stop and check the coolant level. If the coolant fluid needs to be topped up, you can do so only after the engine has cooled down to 60 degrees Celsius (140 degrees Fahrenheit). It usually means waiting a quarter of an hour or more, depending on the outside temperature.

Suppose you don't have coolant fluid or distilled water at hand. You can also use ordinary water in an emergency but must visit the service center later.

A damaged water pump, a cracked head, leaks in the cooling system, or a cracked radiator can cause coolant leakage. If the coolant is not leaking, a malfunctioning switch or fan can cause the engine to overheat.