if you're continuously having sensor codes coming up i would pay close attention to the wire harness and also check relays. The relays have been known to cause all sorts of issues that trigger codes that lead you down the wrong path in diagnosis. Also make sure your negative grounds are clean and tight (on the frame).

There are 2 relay boxes, one beside the fuse box and the other underneath the left step cover. I wouldn't rule out the fuse box either, i've seen the fuses work themselves out of their sockets from vibration causing issues as well. But to have sensors going bad on a single machine repeatedly is uncommon unless there is something else wrong you just havn't found yet.