Today while driving to work (going ~60mph) my AT light all of a sudden illuminated and the vehicle shifted from 4th to 3rd, and would not shift back into 4th. I tried switching to manual mode, but couldn't shift gears at all. Pulled over to the side of the rode and turned the car off, then back on, and the AT light went off and it drove fine after that. Planning on calling the dealer to set up an appointment, but thought I would post here as well for any input. It's got 178k+ miles on it (my commuter car
) and hasn't had any problems up until now.
Thanks for any input, it's really appreciated!

Thanks for any input, it's really appreciated!