Why does the car idle high when starting in the morning during winter?

[MiguelLynn]

It is normal for the car to idle high when starting in the morning during winter. Since the engine temperature is relatively low after a cold start, the sensor will increase the engine speed upon detecting the low temperature. Below are specific details about car idling: 1. Definition: When the engine runs without load, it is called idling. When the engine is running and the accelerator pedal is completely released, the engine is in an idling state. The engine speed during idling is referred to as the idle speed. 2. Function: Idling overcomes the engine's own operational resistance, maintains the minimum engine speed, and provides convenience for the driver to drive and temporarily park in various situations. For example, at traffic lights or in congested traffic areas, even for a short time, temporarily turning off the engine can bring immediate energy-saving and emission-reducing effects.