So I have a little over 200 miles on my renegade I got about two weeks ago. Coming into work this morning I almost passed up the on ramp to the highway I get on. Made a pretty sharp last second turn to make it on the ramp and my check engine light pops on. I also notice it's not shifting up or down as I get to the stop sign to get on the highway. So I get going and it's not shifting or of third gear. I'm in the highway for about a mile to my exit and I try manually shifting and it still does nothing. I reach my exit and pull over. Shut it off, restart and now it doesn't leave second gear. I run it in second for the quarter mile to my work and park. It does go into reverse. Now I have to wait till 9 when the dealer service opens. About a half hour before I take it for a spin to see if anything changed. Check engine light still on but after a quick run it seems to be shifting fine in auto and manual. I'm guessing it was just a sensor that prevented it from shifting and it reset after a time. Should I just disconnect the battery for a minute and see if the light goes out or could it be a more serious issue and take it in? I don't want to waste my time if it was just a sensor and it's fine.