What does the Coolant Temperature gauge indicate when it reaches a dangerous level?

The Coolant Temperature gauge indicates a dangerous level when it lights up red. This red alert signifies that the engine is overheating and that immediate action is required to prevent potential engine damage. An elevated coolant temperature can lead to overheating, which may result in severe mechanical failure if not addressed promptly. The red light serves as a critical warning for the operator to check the vehicle's cooling system, add coolant if necessary, and take appropriate action to avoid breakdown or engine failure.