The past week, my TRAC OFF/ABS INOP lights came on my dash. It happens mostly when I'm on slippery pavement and the traction control activates. Then when it tries to grip as I slow down, the traction starts getting crazy on/off and then the lights come on. I had a guy at work pull the code and it says rear right wheel sensor. I checked the connections because one time I hit a pot hole and it came on so I thought it could have been that. All the wires look good.

Anyone got an idea what this is? Can I just buy a new sensor or does it come as the whole hub or whatever?