The saga continues. 99 exp xlt 5.0 2wd auto trans. Replaced (what I was told is the vss) on the 3rd member. Replaced both wheel speed sensors on front. Still ABS light on all the time. Check Engine Light comes on at highway speeds only. OBD II reports P0500 Never had a problem with shifting, OD is not a problem. It runs fine. I sent this problem to one of those pay for an answer sites. Here was my question and reply(s) "I have a 99 Explorer XLT 2WD. I replaced the sensor on the 3rd member and both front wheel speed sensors. I still have the ABS light and OBD II Code P0500. and NO Speed-O. What should I do next? A bad module maybe?" answer: "My reference material shows the VSS on the side of the transmission. This is the sensor that sends signals to the ecm for the speedometer and odometer. In the overhaul instructions in my reference, it's also called the output shaft speed sensor. Different sized tires from what the vehicle came equipped with will cause the speedometer and odometer to read incorrectly but as far as I know shouldn't cause the fault code you're experiencing. Tiny Answered by rivermikerat (expert) 1,052 answers provided " Keep in mind this was the Free Ask area of the service. ANy ideas anyone?