my O/D OFF button came on. It's not blinking but what could be wrong?

[vizionblind]

Someone said I probably hit a button to have the light turn on. It shows O/D OFF, but it's not blinking.

2000 Mustang with 75,000 miles

Help!

 

[SilverFoxbody]

Its a fualt - you need the codes read by ford. Your MLPS/TCC/VSS sensor are throwing a code. Easy fix.

 

[GREENBIOCH]

Press the OD Button again to turn it off