p0700 limp mode
 

so earlier this week i took my truck out in the snow and i beat on it a little, the next day p0700 popped up. i took the truck home, about 2 miles, it shifted normally. I then let it sit for a day thinking snow got in a connection somewhere causing the code. I drove it again about 4miles, then i noticed when i put it in drive it was staying in 3rd gear. I think its in limp mode, i drove it another 25 miles then parked it. Im not too sure where to start, any ideas?