2004 Kia OptimaNovember 29, 2014Why doesn’t car go into any gear except reverse, speedometer and odometer not working either? HELP!!!!!!! Share Tweet Pinterest Keywords:Optimaspeedometer odometer not workingwont go in gear but reverse 1 thought on “2004 Kia Optima” Freeautomechanic December 8, 2014 at 10:30 am Most common reason for this would be low on transmission fluid. Other causes could be electronic gear selector switch, linkage, internal solenoids failing. VSS- Vehicle speed sensor may be the cause of the speedometer not working. Comments are closed.