Question about 2001 Toyota Sienna

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I have a 2001 Toyota sienna. my brakes where working fine then all of a sudden i had to push the peddle all the way to the floor to stop.could this be my Master cylinder or power brake booster.my brake fluid was a little low but not bad. does not seem to be a leak anywhere.

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  • Toyota Master
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It sounds like the vacuum booster control unit that gives you the power assist check the main vacuum hose that clamps to the unit it mabey leaking engine vacuum or the other end of the hose where it attaches to the intake manifold if there is now leak the unit maybe bad

Posted on Nov 14, 2010

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i have had several sequoias and tundras in my shop with the same complaint , i think its an issue toyota knows about but doesn't want to admit , i think they dont know how to fix it ,although in one instance we got a code for the master cyl psi switch and the customer states after we changed it the "no brake pedal " went away

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Sounds like you will have to bleed your brakes again, but thats not the problem og hard brake peddle, need to check your power brake booster, sit right in back of master cylinder, check make sure it has vacum going to it, also to test it with engine off, press on brake peddle three time, then state engine with foot on peddle, peddle should go down a few inches, also with engine of peddle should feel soft for three pumps, if you have none of this , power brake booster is bad.

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