Throttle position sensor.
Yes, unless you are pulling a trailer.
off unless you are towing
Yes, unless you are towing a heavy load.
What about the overdrive needs reset? If it isn't working, then you need to have the computer checked for codes, you need to check trans fluid. etc...
I have a 1989 Dodge B250...it has overdrive
throttle position sensor most liekly cause
four wheel drive drive line came disconnected
8 unless it is a diesel which has none.
First of all...auto or manual? Also, why was the question asked as if overdrive is it's own gear? Check your fuses first, but with lack of detail there is no definite answer at this time.
Normal cause is a failed TPS. (throttle position sensor)
Overdrive should be ran by electrical ,so check your fuses . If that's not it check wiring that runs to transmission.You will have to get under the vehicle . There is an electrical switch that shifts the trans into overdrive , that is your next step . If you have a owners manual in the glove box it should tell you which fuse runs the overdrive circuit .Hope this helps . Rick
Light being on means overdrive is inactive