Always on, unless you are traveling down a steep hill where you need the extra braking power the engine will provide. You might also want to turn it off if you are pulling a heavy load, which is highly unlikely in a car. OD will improve your gas mileage. Turn it off and your mileage will suffer.
You might have accidentally clicked the overdrive button on your gearshift. The OD off indicates that your car will not shift into overdrive. It is useful to turn your overdrive off if you need to use engine braking to drive in hilly areas. Otherwise, it just wastes gas.
NO, OD off is mainly for increased braking/control when towing.
Many Ford automobile and pickup transmissions have an overdrive function. Most can be turned on and off with a push-on, push-off switch, . The lighted OD-off or indicates that the overdrive function is disabled, turned off. If, while the vehicle is running, you push the button adjacent to the indicator that says OD-off, you will turn on/enable the overdrive function. When the overdrive function is enabled, the OD-off lighted indicator goes of, and there is no indicator when the overdrive is engaged.
The OD button means "Over Drive", off or on.
Could you rephrase the question? Not sure if you are asking a question or making a statement about your car. Normally the OD will turn off if under a certain speed/load condition (slow speeds, high load).
on the side of the shifter there is a od button
there is a button on the gearshift or on 1 of the shifter rods on steering column
If "OD Off" is lit, then your overdrive is off.
My car does NOT do that.
That is the overdrive off button, it is used to turn off OD when not wanted.
Over drive all Kia rio's run on overdrive automatically button to turn off OD is on your gear shift