ABS and brake warning lights turn on and off, could there be air in the ABS?

2001 CHEVROLET SILVERADO
175,000 MILES • 6.0L • V8 • 2WD • AUTOMATIC
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RLPETERSON60
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  • 5 POSTS
I've been having this problem with the ABS and brake light coming on then disappear. I've replaced the hub bearing and it didn't solve the problem. There aren't any ABS codes so I don't know why the ABS light is coming on. Could it be that there is there is air in the ABS unit? Would this cause the problem that I'm seeing?
Dec 7, 2023 at 12:33 PM
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JACOBANDNICKOLAS
  • ✓Experienced Mechanic
  • 110,240 POSTS
Hi,

If the system hasn't been opened, air shouldn't be an issue. Have you checked all wheel speed sensors?

Also, if you have a live data scanner, here is what I suggest. Watch the wheels' speed when moving. See if one of the wheels' speeds is different than the others. If it is, inspect that wheel speed sensor. If the sensor is sending an inaccurate signal, it won't set a code because the module doesn't realize it isn't sliding or skidding.

Take a look through this link, you may find it helpful:

https://www.2carpros.com/articles/7-common-symptoms-of-a-bad-automotive-abs-module

Let me know.

Joe
Dec 7, 2023 at 1:28 PM
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