What does a red coolant temperature light indicate?

[SerenityLee]

The red coolant temperature warning light indicates that the engine coolant temperature is too high, signaling an abnormality in the engine cooling system. Here is relevant information: 1. Overheating: Excessive coolant temperature causes significant damage to the engine, commonly referred to as "boiling over," with excessive noise being the first symptom. Overheating can lead to deformation or even damage of the cylinder head and engine block, as well as dilution of engine oil and altered performance of automotive components. The optimal normal coolant temperature range is between 75 to 90 degrees Celsius. 2. Precautions: If overheating occurs, first reduce speed and pull over to the roadside. Do not immediately shut off the engine, as excessively high temperatures can cause overheating of pistons, cylinder walls, cylinders, crankshafts, etc., thinning the engine oil and causing loss of lubrication.