93 civic dx - I was on my way to work and the speedometer started jumping around, then it zeroed out and the CEL came on but the odometer kept counting miles. I made it to work and when I got off I started it up and all was good. no CEL and speedo worked fine. Its done this twice in the past week and I'm thinking it has something to do with the speed sensor but I'm not sure what, exactly. any advice is greatly appreciated, thanks!