odometer

So a while back i was driving pretty fast. And my speedometer went to 0 and stayed there. My odometer also wont track miles and engine light appeared. I took it to my mechanic who pulled codes. He said that the computer systems in my car where not communicating or something. Any help on what...

Worked before we took her apart, then after it stopped working also, the odometer stopped working at the same time what should i check?

Hi everyone. I just purchased a 96 Jetta GL and the speedo and odo are not working. I also have a check engine light on but do not have an ODB1 scanner only ODB2. I Found a broken 3 wire sensor on the Automatic trans. It is located at the rear left side of the trans near what looks to be a...