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What does it mean when a car displays 'check coolant'?

1 Answers

ElliotFitz

07/24/25 5:27pm

When a car displays 'check coolant', it is usually due to insufficient coolant level, which requires adding more. You should check if the antifreeze is adequate. The full name of coolant should be antifreeze coolant, meaning it is a coolant with antifreeze functionality. Antifreeze prevents the coolant from freezing and cracking the radiator or damaging the engine block during cold weather when the car is parked. However, it's important to correct a common misconception: antifreeze is not just for winter use; it should be used year-round. In regular car maintenance, the engine antifreeze should be replaced every year. Functions of coolant: Winter antifreeze protection - After parking in winter, coolant can freeze and cause the radiator or engine block to crack. Therefore, the freezing point of the coolant should be about 10 degrees Celsius lower than the lowest temperature in the region to prepare for sudden weather changes.

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