Weird Pump Sound After Shutting Off Car???

If the sound is about 10 seconds and is somewhat like a teapot it's normal

 

It's really not cutting in and out, it's continuous for about 10 seconds. It's just sometimes the tea kettle sounds come in and out, making it sound like that. It's actually a continuous pump.

You can replace the pump and you'll get rid of the tea kettle sound. But that pump only runs for 10 seconds at a time, do you really want to spend the money?

 

Don't forget to check the coolant level.

 

Could be the Brake Actuator slowly going out.

What does this funny and loud noise sound like?

 

If you can sit in the car and with car off pump the brakes and you can hear that sound it’s the brake vac assist pump. Sounds like a rattle snake. You will hear that constantly. If you open the door first thing in the morning you will actuate that pump also.
The engine is not always on to provide vacuum to the brakes so and ekectric pump is used.
If it’s on all the time like SFO says the abs unit has a leak. Usually you will see dash codes and brakes will feel bad if that unit fails.
It’s $$$$$$

Car must be new to you. If so read up on its quirks on this site.
And if you searched you would see hundreds of hits on this also. Use search forum button on top of page.

 

Isn't it the thermos pump filling up the thermos with hot coolant for the next restart. His 07 has the thermos, right?

 

This is the pump that gets coolant to the thermos

 

yep

The CHRS pump. Search forum button hundreds of posts.

 

Most likely the CHRS pump as stated earlier. The sound may occur when you start the car and shut-off the car, as these are the times when the CHRS pump is activated. Sometimes you will get the sound at both ON and OFF, or maybe just ON, or maybe at OFF.

Most people live with it, as it is a $152 part (16290-21011), and does not affect performance/reliability.
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When the part fails, and triggers the CEL, then you will have to replace it, as you will no longer pass emissions.

 

Just a heads-up that there is a similarly described noise coming from the same region of the engine bay. It is often the coolant control valve. I am posting this because I thought my noise was the CHRS, but it really is the CCV.

 

My 2004 has the same noise, it’s the abs pump going out.

 

The noise in the video in post #15 is actually the coolant control valve (as stated by the poster) hunting for its position and not finding it. That is, it has failed.

It is not the "ABS going out".

 

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Coolant flow control valve replacement | PriusChat