Why is there still sound from the engine after the car is turned off?

[BeauFitz]

The reasons why there is still sound from the engine after the car is turned off: 1. When the engine temperature is too high, even if the car is turned off and the key is removed, the cooling system will automatically start to cool the engine system, resulting in a whooshing sound, which is the sound of the electronic fan rotating at high speed; 2. After the engine system temperature drops, the cooling system will automatically stop working. This situation may last for three to five minutes. Modern cars are designed with a delayed cooling function to prevent the engine or turbocharger from overheating, which better protects the engine and turbocharger and extends their service life.