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#1 (permalink) Old 01-10-2010, 09:52 AM
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Default Noise when Starting and Shutting down

Folks,

Over the past few months, our 06 Prius is making quite a squirrly noise which sounds like an electric motor turning or something, just after you turn on and take away power to the car. It has always been around, but now seems like it is louder and it sounds like something is actually loose inside wherever it is coming from. It lasts about 5 seconds each time. Hard to describe...if need be I could probably get an MP3 of the noise...

Thanks in advance for any ideas on what this might be. It almost sounds like something is beginning to fail.

JBL
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#2 (permalink) Old 01-10-2010, 01:07 PM
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Default Re: Noise when Starting and Shutting down

Search the site or google the web for posts about the electric thermos water pump failures on some cars.

How many miles on the car? Do you have an extended warranty? What state are you in? All these may influence who pays for the repair, you or Toyota.

2005 Seaside Pearl, BC#6
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#3 (permalink) Old 01-10-2010, 02:50 PM
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Default Re: Noise when Starting and Shutting down

Just passed 40k miles and I do have the extended warranty, which is good until May of 2012. Not sure what state you reside in matters??
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#4 (permalink) Old 01-11-2010, 12:52 AM
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Default Re: Noise when Starting and Shutting down

Some states such as California have an extended power train and emissions warranty law, part of the PZEV designation. One could argue the thermos and pump are there to speed warmup, and therefore are there primarily for emissions reasons, and would be covered under this longer warranty.

Search this site, Prius Chat, or just google for TSBs or other notices of waterpump failures and then take the car into the dealer under warranty.

Stuff like this:
http://priuschat.com/forums/gen-ii-p...led-right.html

2005 Seaside Pearl, BC#6
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#5 (permalink) Old 01-11-2010, 08:09 AM
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Default Re: Noise when Starting and Shutting down

OK well thanks for the info. The car is not throwing any codes as of yet, but like I mentioned that noise is more pronounced as you power up, and power down the car...guess I just hope whatever fails does so before my extended warranty runs out.
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#6 (permalink) Old 01-11-2010, 08:53 PM
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Default Re: Noise when Starting and Shutting down

It's typical for the thermos pump to be noiser when it's cold outside. I experienced it with my 04 and with my 09. When the weather warms, the noise is less.
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#7 (permalink) Old 01-11-2010, 10:57 PM
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Default Re: Noise when Starting and Shutting down

As time progresses you will find many more strange to you sounds and small "glitches" with your hybrid. Most correct themself after one shut-down and start up. You don't have to worry about a single one until you get an "idiot light." There's one for every system in the car.
As long as you have a full radiator I doubt the thermos system would have little effect on the emmission system. It is in the car to increase milage only.
Glad you picked up the extended warranty. You have absolutly nothing about the car now to be concerned with.
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#8 (permalink) Old 01-11-2010, 11:54 PM
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Default Re: Noise when Starting and Shutting down

I would take it to a dealer and have them investigate (and do not let them charge you a silly "diagnostic fee"). This way, even if the failure is down the road a bit, you have documentation in their system (and a printed copy you keep) that you reported it during the warranty period. Just in case...

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