I got it on a lift and had a good look from underneath the other week and everything looked really good (except the wasted rear shocks). I also got a new scanner (Autel AL619) the other week, so today after swapping the rear shocks (Monroe MA-824, ~$70 O'Reilly's, <1hr) I plugged it in...right front wheel speed errors! That hub was replaced just over 2 years and 15K miles ago, gonna have to check what that warranty says.

 

Check the wiring and plug going to the wheel hub for open or intermittent connections.