[pimperell]

When i push the o/d button on my gear shifter nothing happens. 08 versa 1.8 s cvt transmission

When you press the OD button and you see it light up on the dash what happens is that it locks the tranny in a lower gear; short of like downshifting with a manual. However keeping it there actually lowers gas mileage, and yes it stands for overdrive...