What does the coolant indicator light mean in a car?

[VivienneLee]

When the coolant indicator light appears in a car, it shows two wavy lines at the bottom representing water. Here is relevant information: 1. Symbol: There is a thermometer between the wavy lines. Coolant is commonly known as antifreeze, with its full name being antifreeze coolant. 2. Types of automotive coolant: Alcohol-based coolant, glycerol-based coolant, ethylene glycol-based coolant, and propylene glycol-based coolant. Below are extended details about automotive coolant functions: 1. Engine protection: Prevents the car's radiator and engine block from cracking due to freezing in low-temperature environments. 2. Cooling system: Protects the cooling system from corrosion. 3. Scale prevention: Reduces scale formation during circulation. 4. Heat absorption: Absorbs heat to keep the radiator from boiling under high temperatures.