Have the OBDII code read to see if there is a code . speed sensor failure will always throw a code . Check to see if the odometeris still working . If it is then the instrumentation panel is defective . A used panel from the auto wreckers will do the ECM will reset your mileage once installed . The parts on the instrumentation cluster are not really interchangeable you will need a whole unite and they tend to be pricey from new. if you do get a p0500 or p0501 are the usual codes depending on your car there can be an input and an output sensor . Even if only one is showing replace both if you dont you probably will have a failure on the second within days of replacing the first one . Hope this helps