Hello,
I've had griding from what I believe is the front passenger hub bearing.
Today I was driving to work and all of the sudden the ABS light comes on and the Trac Off light comes on also.
The car continued driving fine.
I got to work and was there for 10 hrs. Got back in the car and the lights were gone.
Drove a couple of miles and they came back on.
I tested the ABS and its not coming on.
Any ideas? Think it might be the bearing?
Thank you.

If you are hearing grinding and the ABS and Trac lights are on, then I would assume a bad bearing. Jack up the car and spin by hand, and feel for play to determine which one is bad. Then replace it.