Great thank you. Now, did you ever press the o/d button, or did the light come on all by itself? Next, while driving, can you feel the transmission go into 4th gear (overdrive)
The way to tell is you should feel 3 shifts from a stop to highway speeds.
Great info thanks! Put the car in neutral, then shut off with parking brake on, and remove the center consule. Disconnect all connectors to the shifter, (for o/d button)
with battery disconnected for 15 minutes. Start the car and see if o/d lamp is now off, if so the button itself is shorted (spills, or just part shorted). If o/d lamp is now off, o/d button or shifter handle needs to be replaced. If o/d lamp still on, could be wiring, or pcm not opening/ closing transister internal to allow lamp to shut off along with allowing 4th gear.
Also, to help with removing consule, remove the cup holder inserts and screws up front, glove box top, and pop out rear trim on rear of consule, should come out easily.