It is likely that yur vehicle speed sensor has failed
preventing the ECM from knowing how fast your are traveling.
This not only screws the speedometer but, the transmission,
the engine emission controls, the antilock brakes and
everything else that needs a speed reference. Have the
fault codes read from the ECM and go from there. Once this
is properly repaired, you will notice a major improvement in
other vehicle performance areas. Until this is done, the
light will remain on and your vehicle is limping along using
more fuel, emitting more polution and a general PITA to
Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here.
All logos and trade names are the property of their respective owners.