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Fault messages after changing brake Master cylinder

Tiny
SHARJEEL LASHARIE
  • MEMBER
  • 2005 CADILLAC ESCALADE
  • 6.0L
  • V8
  • 2WD
  • AUTOMATIC
  • 200,000 MILES
Hi,

I followed the instructions posted here to replace my brake master cylinder.
The brakes are working fine but as soon as I start the car, I get messages saying "service brake system" and "stability control disabled"

What could I have done wrong? And how can I fix it now?

Regards,
Sharjeel
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Monday, June 12th, 2017 AT 3:00 AM

7 Replies

Tiny
MHPAUTOS
  • MECHANIC
  • 31,937 POSTS
I will need to know if any OBD11 codes are present. Also, did you bleed the brakes correctly?
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Monday, June 12th, 2017 AT 4:54 AM
Tiny
SHARJEEL LASHARIE
  • MEMBER
  • 4 POSTS
Thanks for your reply. There are no ODBII codes. I thought I bled the system well.
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Monday, June 12th, 2017 AT 5:08 AM
Tiny
MHPAUTOS
  • MECHANIC
  • 31,937 POSTS
Often this can be a bleed issue. I would go and re bleed again just to make sure and let me know what expires.
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Monday, June 12th, 2017 AT 5:14 AM
Tiny
STEVE W.
  • MECHANIC
  • 13,461 POSTS
Did you use a scan tool to bleed the ABS system? Any air that gets into that system will cause this.
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Monday, June 12th, 2017 AT 6:28 AM
Tiny
SHARJEEL LASHARIE
  • MEMBER
  • 4 POSTS
Thank you again. I did not use a scan tool. Is normal bleeding going to get rid of the air or shall I start with bench bleeding?
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Monday, June 12th, 2017 AT 10:48 PM
Tiny
SHARJEEL LASHARIE
  • MEMBER
  • 4 POSTS
OK. I managed to fix it. There were probably a few air bubbles trapped in the system and I managed to get them out by braking hard and holding the pedal for ten seconds and then letting go with a snap.
I had to do that 4-5 times and then on the last time, the warning lights went out and the system came on. I checked by switching the Stability control a few times. All is well now.
Thanks for your support.
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Thursday, June 15th, 2017 AT 4:05 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,602 POSTS
Glad you could get it fixed, that kind of problem can be tough. Please use 2CarPros anytime we are here to help

Cheers, Ken
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Saturday, June 17th, 2017 AT 1:50 PM

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