If the overdrive light won't go off or it flashes this indicates a transmission problem. It could be a matter of replacing the shift solenoids or an entire rebuild. You might try pulling the codes and see if any of them indicate a transmission problem.
Check fuses and light bulbs
Push the button.
Change the front turn signal light bulb. It's bad.
1997 fordexpedition wont start and the theft light is flashing
The main dome light control switch is turned off.
Start with checking the fuses.
yes it will start it just wont go into overdrive when you are driving it drrba
95 mitsubishi montero sr wont shift to overdrive why
the four wheel drive is opperated by vacuum that's probably where your problem is
overdrive wont let you shift into foruth? its made to not let you
its the tps
Maybe the bulb is burned out