ABS light came on

2002 CHEVROLET AVALANCHE
200,000 MILES • 5.3L • V8 • 4WD • AUTOMATIC
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DIANE PETERSON
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  • 2 POSTS
ABS light came on while driving pedal goes from hard to soft. Light goes off and comes back intermittently. When light is on brakes work fine. When light goes off brakes are unreliable. Pedal gets hard and makes noise. Should we be looking at booster or sensor?
Apr 23, 2017 at 6:44 AM
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HMAC300
  • ✓ASE Certified Mechanic
  • 48,601 POSTS
  • ASE Certified Mechanic
when ABS light is on then the unit is not working and you just have standard power brakes if it is power. These video can help us fix it

https://youtu.be/Pb6nXV-iamI

and

https://youtu.be/rTtAnsOlZU4

Please run down these guides and report back.
Apr 23, 2017 at 9:00 AM
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DIANE PETERSON
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  • 2 POSTS
We had mechanic scan and two codes show sensor on right front and rear are showing error. We also checked all brake pads. Left rear pad is almost gone but other three sets all look brand new. We replaced all pads less than a year ago. Could sensors be causing that issue as well?
Apr 23, 2017 at 9:33 AM
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HMAC300
  • ✓ASE Certified Mechanic
  • 48,601 POSTS
  • ASE Certified Mechanic
probably the sensor is the cause or air in ABS unit, probably both. the pad that is almost gone is more than likely the caliper is frozen or not sliding in bracket and should be fixed.
Apr 23, 2017 at 11:52 AM
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KENNG3666
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  • 1 POST
i changed passenger wheel bearing and now the abs light wont go off i disconnected battery nothing bleed breaks how can sensor go bad by changing wheel bearings
Feb 19, 2021 at 11:19 AM (Merged)
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RHALL77
  • ✓ASE Certified Mechanic
  • 3,361 POSTS
  • ASE Certified Mechanic
check and make sure you didnt crack the sensor when you removed it. Is there a way you could stop somewhere and get the ABS codes for me so I can help you the best that i can?
Feb 19, 2021 at 11:19 AM (Merged)
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