I have a 2004 Nissan Titan 2WD with disc brakes. The driver side rear brake started binding yesterday (the caliper would squeeze the brake pads onto the rotor as if I were braking). So I inspected and figured it was the caliper itself (it looked really old and gunky, so I thought the piston/pin was getting stuck). I was wrong, I just got finished putting on a brand new caliper and it's still doing this. Could a bad ABS sensor cause this? I'm just trying to save some money b/c this seems like it should be an easy fix. Any ideas would help. thanks!