What does the engine grid heater indicator lamp signify?

The engine grid heater indicator lamp signifies the engine starting condition by indicating that the engine's grid heaters are activated. These heaters warm up the air entering the engine's cylinders, which is crucial for starting the engine, particularly in cold weather. When the grid heaters are functioning, the indicator lamp lights up, alerting the operator that the heaters are warming the air to improve combustion. Effective heating is vital for reliable engine starts, especially in low-temperature environments where engine oil may thicken, making it harder to turn over the engine.

Options about engine temperature readiness, fuel level alert, and oil pressure status relate to different aspects of engine operation and do not reflect the specific function of the grid heater indicator lamp. Each of those indicators serves a distinct purpose, but they do not involve the pre-start heating action provided by grid heaters necessary for enhancing the engine's starting capabilities.