How do you know which wheel sensor is bad?

 

If you know anyone with an UpRev or any other code reader that can read ABS modules, it will tell you which sensor is defective.

Also, the brake light can mean you need brake fluid, which in turn means you are probably due for some new brakes sometime soon.

 

Can also mean a dead alternator.

 

they reset mine and it never came back on, go figure. He said it was "low fluid", but fluid is not low.