Which of the following is an indicator of engine overheating?

An elevated temperature gauge reading is a clear indicator of engine overheating. The temperature gauge monitors the engine's operating temperatures, and when it rises above the normal operating range, it suggests that the engine is generating excessive heat. This excess heat can result from various issues, such as coolant loss, a malfunctioning thermostat, or radiator problems, and can lead to serious engine damage if not addressed promptly.

In the context of engine performance, continuous monitoring of the temperature gauge is crucial. If the gauge indicates temperatures that are too high, it serves as an urgent warning for the driver or technician to take corrective actions, such as checking coolant levels or assessing the cooling system's functionality. Recognizing an elevated temperature reading helps prevent catastrophic failure and maintain engine health.