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Brake pedal pulsing

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Old 04-15-2016, 10:48 AM
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Jdinark
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Default Brake pedal pulsing
My Abs light has returned and now when I am sitting at a stop with my brake pedal depressed it starts to push back and the brakes release. Any ideas what is causing this ?
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Old 04-15-2016, 02:28 PM
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Mongo
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My S4 just started doing this too. I fear a failing master cylinder sadly.
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Old 04-15-2016, 02:40 PM
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Speedtoys
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the pulsing is the ABS pump.

The light..is an abs sensor not working.

M/C not either.
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Old 04-15-2016, 03:16 PM
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Mongo
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So this is signs of an ABS pump going kaput?
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Old 04-15-2016, 06:22 PM
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dr bob
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Unplug the ABS relays/fuse and see if the pulsing goes away. That will help isolate the area of the cause.
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