Intermittent Problem with Brakes - Toyota Prius Forum : Toyota Prius Forums
 
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post #1 of 2 Old 02-14-2020, 12:34 PM Thread Starter
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Default Intermittent Problem with Brakes

Hi, I bought a used 2007 Prius a few months ago. Mostly it's running great, but there's one thing. This has happened several times since I got it and I believe that it is more likely to happen in cold weather (I'm in Minneapolis, so I mean when its below 10 degrees F)

The order of events is always the same. I turn on the car and the parking brake light is on when the parking break is not deployed. There is no problem driving. Then, after 5-15 minutes, the exclamation mark symbol, ABS, and VSC lights turn on. At this time, there is also a reduction in braking power, it feels like my brakes are running at 70% or so. Usually, the lights turn off and the function is restored after some period of time. I've also noticed that it can be reset often by me slamming on the brakes.

Any idea what is happening? I haven't brought it into a mechanic yet.
Peter Breen VanKoughnett is offline  
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post #2 of 2 Old 02-14-2020, 04:18 PM
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Quote:
Originally Posted by Peter Breen VanKoughnett View Post
I turn on the car and the parking brake light is on when the parking break is not deployed.

Any idea what is happening? I haven't brought it into a mechanic yet.
IIRC, that brake light is a dual function one and it also indicates a "general" brake fault.

You have a 13 year old car, presumably with a LOT of miles.
It is not uncommon for people to neglect their brakes for that long.......when the recommended service interval is 2 to 4 years.

It most likely is now "pay me later" time and you need a complete brake service.
Don't be surprised if it doesn't run well over $500; maybe twice that.

Good luck.

'17 Prius C-4
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