Loud Shutdown Noise in Cool to Cold Weather

I drive a 2004 Prius. I just had 25,000 miles service done on it today.

I would like to know if others have experienced the phenomenon I describe below.

Since December or January, if the ambient temperature is below 40 degrees F, and if I drive just a few miles, when I shut down the car the normally almost inaudible shutdown noises becomes much louder. The louder sound is very much like a hen house after one of the hens has laid an egg. It lasts the normal ~30 seconds.

I am concerned that trouble may be developing. I'd like to nip it in the bud.

The service department at my dealership on the San Francisco Peninsula had not heard any similar complaints. It was too warm this morning to elicit the sound for them to hear.

baumgrenze

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baumgrenze
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