When a temperature gauge reads hot, what should be done first?

When a temperature gauge reads hot, what should be done first?

• A. Open the radiator cap
• B. Check coolant level
• C. Start the engine again
• D. Turn the engine off

Answer: (D)

When the temperature gauge shows hot, the priority is to stop the overheating safely. Turning the engine off immediately helps the cooling system stop building heat and reduces the risk of serious engine damage. It also prevents burns from hot coolant or steam if you were to open any caps while the engine is still hot. Once the engine has cooled, you can check the coolant level and look for leaks, adding coolant if needed, and have the cooling system inspected if overheating recurs. Avoid opening the radiator cap while the engine is hot, and don’t keep driving with the gauge reading hot.

When the temperature gauge shows hot, the priority is to stop the overheating safely. Turning the engine off immediately helps the cooling system stop building heat and reduces the risk of serious engine damage. It also prevents burns from hot coolant or steam if you were to open any caps while the engine is still hot. Once the engine has cooled, you can check the coolant level and look for leaks, adding coolant if needed, and have the cooling system inspected if overheating recurs. Avoid opening the radiator cap while the engine is hot, and don’t keep driving with the gauge reading hot.