What is the whirring sound after the Toyota Prius is powered down?

I hear a whirring sound for about 30 seconds after I power down the Toyota Prius. Anyone knows what that is? Is it a problem?What is the whirring sound after the Toyota Prius is powered down?http://www.vfaq.net/FAQ-misc.html#whirri鈥?/a>



As long as the sound doesn't start getting louder or clunking, it is perfectly normal on a North American 2004-current Prius. It's the pump taking warm engine coolant and putting it into the little thermos of the CHHS (coolant heat storage system), to store for use when you next start up your Prius to more quickly warm up the engine.What is the whirring sound after the Toyota Prius is powered down?
the fan cooling the turbo or the fan still running to cool the enginge before it stops, depends if you have a turbo or not.



BUT IT IS THE RADIATOR FANWhat is the whirring sound after the Toyota Prius is powered down?I think it's the electric motors that take slightly more time to power down, shouldn't be a problem.What is the whirring sound after the Toyota Prius is powered down?
It is most likely the radiator fan, after you have stopped the engine coolant temperature could still be high enough to keep the fan runningWhat is the whirring sound after the Toyota Prius is powered down?Electric motor.