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As soon as engine is started brake pedal becomes soft

Tiny
L TIATOM
  • MEMBER
  • 2011 HYUNDAI I20
  • 1.2L
  • 4 CYL
  • 4WD
  • 36,000 MILES
On engine off, when brake is depressed and released several times, eventually it becomes hard. As soon as engine is started, it becomes soft. This is normal. However, recently, even when off it doesn't come hard even after several times of depressed. I can even do the play at any moment.
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Sunday, May 5th, 2019 AT 2:28 AM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,643 POSTS
Hello,

It sounds like the brake booster could be having an issue but to be sure can you please shoot a quick video with your phone so we can see what's going on, that would be great. You can upload it here with your response.
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Monday, May 6th, 2019 AT 3:31 PM

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