kia picanto lx 2004 auto - why has my OD light come on - lynworl

my OD light has come on and i didnt have a manual with the car can you help me? it says ( OD off ) i have never had it happen before hope you can help........ Linda

kia picanto lx 2004 auto - why has my OD light come on - Collos25

Is there a button somewhere perhaps on top of the gear change,it stops the car from changing into top gear I think some sort of sports mode.