Alright I was thinking my sensor wasn't plugged in but when I jacked up the car, and looked under, the sensor was plugged in..
So my question is, if its not the sensor being plugged in what could be the problem??
Its an eletric speedometer FWIW

 

Well I wiggled the connection this morning and it was working (somewhat) it was just catching up to speed when I got there (it would jump from 20 to 45 etc.)
Anyone got any ideas with this?? Im just thinking its a lose connection, and just thinking about putting eletrical tape around it

 

Never mind..
It was a loose connection at the sensor, Just tightened the stupid thing up, and now my speedo is working..

But check engine still on??