Since hes too elitist to tell you what VSS is both times he used the abbreviation, it stands for Vehicle Speed Sensor. It will cause your speedometer and cruise control to stop working. Mine went out once too. No big deal if thats what it is, its an easy fix. I drove a couple thousand miles with mine that way since it happened at the begining of a road trip. Got way better at estimating my speed during that time. Also the miles didn't go on the odometer
This never made my car throw a CEL.