On my way to work earlier this week, cruising along the interstate at a nice smooth 72MPH when my cruise control kicked off, my traction light came on, my ABS light came on, and the service AWD message appeared in the display. The traction light and abs light has stayed on since then, and the service AWD message resets everytime I turn the car off. When I start it up and get to about 10mph, the service message pops back up. I have unhooked the battery and left it unhooked for an hour but the ABS and traction light won't go away at all.
I have read post after post regarding this issue, and at the moment I assume it's a wheel speed sensor. My question is, how do I know which one it is that needs replaced? I have a cheap OBDII scanner that doesn't show any fault codes. I assume that my scanner is only reading codes from the check engine light since I'm getting no codes from the other lights.
Would a parts store like autozone or advance be able to use a scanner to see what sensor is bad (if in fact that is the problem), or does this require a diagnosis from a Dodge Garage?
Thanks for any advice.