What does it mean when the ECO light appears on the car dashboard?

[ORosalie]

ECO indicates that the vehicle's economical driving mode is activated. ECO is an English abbreviation derived from the combination of Ecology (environmental protection), Conservation (energy saving), and Optimization (power). The Eco mode is further divided into active Eco driving mode and non-active Eco driving mode. When the ECO indicator light on the dashboard illuminates, it signifies that the vehicle's economical mode has been engaged. ECO mode can be either active or non-active. The difference lies in the fact that the active mode has a dedicated button, allowing the driver to choose whether to activate it. When the driver presses the ECO mode switch, the dashboard indicator light immediately turns on, and the vehicle automatically adjusts settings such as throttle opening, transmission shift logic, and air conditioning output power. Non-active ECO mode does not have a dedicated button. When the ECO indicator light on the dashboard illuminates, it serves merely as a reminder function. ECO automatically evaluates your driving behavior. If your current driving operation achieves the optimal fuel supply, the dashboard will simultaneously display the ECO indicator light. Most vehicles employ the active ECO driving mode, meaning they have a dedicated switch button. Therefore, during daily driving, we can activate the ECO mode. However, it is unnecessary to engage ECO mode when driving at speeds exceeding 120 km/h, during idle parking, in N/P gear, or in manual mode, especially when climbing hills. In such scenarios, the ECO mode not only fails to demonstrate its fuel-saving characteristics but also impacts the vehicle's power performance. Additionally, the ECO mode typically becomes ineffective under the following conditions: When the vehicle speed exceeds 120 km/h, the system prioritizes speed, causing the ECO mode to deactivate automatically. During idle parking, in N/P gear, or in manual mode, the ECO mode may also become ineffective. When high torque output is required, such as when climbing a hill, the engine control unit prioritizes ensuring sufficient power to drive the vehicle, and the ECO mode will not function.