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Brakes squeak in cold weather / at altitude

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by fabgo, Feb 22, 2006.

  1. fabgo

    fabgo New Member

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    Jul 15, 2004
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    I took my 2004 Prius to Yosemite last weekend in quite cold weather (18F), and noticed that the breaks started squeaking.

    What happens is when I depress the brake pedal fully after the car has come to a complete stop, every second or two a squeaking sound is emanating from the brakes or their vicinity. It sounds like something is slipping as torque is applied, resulting in a squeak or high-pitched squeal. I tried switching to park after stopping, and still get the same thing when I press the brake pedal.

    Once I was back down in warmer weather the squeaking sound slowly went away (after 24 hours). Anyone else experience something similar or have any clue as to what this might be?
     
    #1 fabgo, Feb 22, 2006
  2. hawkjm73

    hawkjm73 New Member

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    Apr 19, 2005
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    Phoenix, Arizona
    While I do not know the cause, I second that my car does it at well. I only notice it when the car has been sitting for at least several hours in ambiant temps in the 30's. Once I've been moving a while and the car warms, it goes away. It dosen't get much colder here, so I can't say how long it would last in really cold weather. I amin Phoenix, and I think the altitude is a bit over 900 feet from sea level. I would imagine, though, it is a part of the hydrolyc brake system. I'm not too worried about it. I did have it in to Toyota when I first heard it, and they said not to worry. Don't know how far I would trust such a statment though, as no warning lights were on.
     
    #2 hawkjm73, Feb 23, 2006
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