And here we go again. As soon as one thing gets done it's something else. So the car has been kind of stuttering sometimes for about a month. My odometer sometimes will shoot up to 80 then down to 0, most of the time it goes right back to normal but the other day it stayed at 0 for about 15 min.Idk if that has anything to do with the vehicle speed sensor code? Is P0502 a expensive fix? And where is it located?