Strange noise when stopped and foot on brake

Could be the brake actuator, if it is then you get a free replacement if you can get to the dealership before the end of the year. Next year it's on you $$$$. See this thread:

Brake actuator "warranty extension" from Toyota | PriusChat

 

I am impressed at your audio, I have a different noise but it's the pad against the rotor, which I know that your sound is not that. I do have very limited technical knowledge but the sound is familiar I hear it when I shut off the car and I believe it has something to do with the electrical part of the braking system not the mechanical. I could be off or not exact enough and I hope I am correct or that my response is expanded upon

 

I could hear two sounds. First sounds like a duckling, and second noise is the normal barking noise of a failing abs actuator.

Which of the noises are you referring to?

Your abs pump might be giving way already. Got any lights on the dash? VSC, ABS, brake lights?

I'm some cases, they've not being lights on the dash, but yet, the actuator fails. If you're still under warranty, dealership replaces it free. But if you're off, cost falls on you. Get a new of old one from a salvage yard.

 

Under warranty until December 31, 2017 regardless of mileage. You better get a move on it and get it to the dealer. At least get it diagnosed and it could save you thousands if it's under warranty. You have only a couple days left.

View attachment Prius 2nd gen - brake actuator warranty extension.pdf

 

JC has the right answer, so hurry. Also, I had the same noise in my '05 last year, but there was no code, so they couldn't get Toyota to pay for it, even though the dealer agreed that it was coming from the accumulator pump. I wound up trading it, so have no idea what finally happened.

 

Thanks for the followup!

 

I think I have the same issue! I'll take it in next week assuming it's an actuator leak and a $2k bill . I won't have a warranty unfortunately.

 

My car is doing this exact thing. Looks like this problem was happening a few months ago for you. Did you get anything checked out?