How Long Can You Drive with the Coolant Light On?

[SanCassidy]

The coolant light being on means you should not continue driving. A coolant warning indicates that the car's coolant level is insufficient, or it may be an alert for an overheated radiator. Continuing to drive in this condition can cause the engine temperature to rise further, potentially damaging the engine. To avoid unnecessary losses and ensure safety, you must stop driving immediately. Relevant information is as follows: If the coolant warning is due to the engine overheating, it is best to pull over, keep the engine idling, open the hood, and allow it to cool down until the temperature warning disappears. If the issue is low coolant levels and no coolant is available for immediate replenishment, you can add an appropriate amount of purified water—preferably soft water (distilled water)—but avoid using hard water like tap water. Do not add too much, as it may alter the coolant's boiling point.