What might be going on if the Anti-Lock Brake Light comes on when your driving? on 2009 Chrysler Sebring

Can Auto Zone Put my car on their machine and tell me what is wrong? Maybe if its just the sensor.

Asked by for the 2009 Chrysler Sebring
It could be a bad senor , it could be in the wiring, and also could be a loose or bad wheel bearing. Also check the reloctor ring for cracks