Okay, so it isn't the lube shop that did it to me this time -- the last time a lube shop overfilled my brake fluid reservoir and caused all sorts of havoc. This time the tire shop did a simple tire rotation and managed to knock something askew in my ABS system. :clap: I'm getting the ABS Fault and Traction Failure messages and lights on my 99 4.0SE. I'm guessing they knocked one of my sensors out of whack. I don't want them touching the thing again, so I'm going to do some troubleshooting myself. Others on here have mentioned loose ABS sensors -- so I'll check for that and any other kind of obvious damage to the sensors or their wiring. How fragile are the sensors? Can I try to tap them back in with a rubber mallet or a block of wood with a small hammer? Any other things I should be looking at while I'm under there? I just had a new ABS booster installed, but the messages came on immediately after I got the rig back from the tire shop.