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

[Brian]

When the eco indicator light on the car is on, it indicates that the vehicle's economy mode has been 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. Eco mode is categorized into active and non-active types, with the difference being that the active type has its own dedicated button, allowing the driver to choose whether to activate it. When the driver presses the eco mode switch, the dashboard indicator light will immediately illuminate, and the vehicle will automatically begin adjusting settings such as throttle opening, transmission shift logic, and air conditioning output power. The non-active eco mode does not have a dedicated button. When the dashboard eco indicator light is on, it serves merely as a reminder function. The eco system automatically evaluates driving behavior, and if the current driving operation achieves the optimal fuel supply, the dashboard will simultaneously display the eco indicator light. Most cars use the active eco driving mode, meaning they have their own switch button. Therefore, during daily driving, the eco mode can be activated. However, it is unnecessary to turn on the 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, as it does not reflect the fuel-saving characteristics of the eco mode. In addition, the eco mode typically becomes ineffective under the following conditions: When the vehicle speed exceeds 120 kilometers per hour, the car will prioritize speed, and the eco mode will automatically deactivate. During idle parking or when in N/P gear or manual mode, the eco mode may also become ineffective. When high torque output is required, such as when climbing a hill, the engine computer will prioritize ensuring sufficient power to drive the vehicle, and the eco mode will not function.