Idle (engine)

Idle refers to a state of an engine, particularly in vehicles, where the engine is running but the vehicle is not in motion. During idle, the engine continues to operate, allowing systems such as the electrical system (lights, radio, etc.) and climate control (heating, air conditioning) to function. Idling can occur for various reasons, such as when a driver is waiting at a red light, in traffic, or parked but still wants to use the car's accessories.