My daughter bought a used 13 Sorento. I had a first gen Sorento (03) and I really liked it. The 2nd gen is much different, I've noticed. The AWD with the dynamax system is not working properly. The other day my daughter was driving home in snow / ice road conditions. The front tires slipped on gradual acceleration and the traction control light came on, as well as the 4x4 light. (which stayed on) The traction control works fine. She checked her owners manual and it says when that happens, it means that there is a possible problem with the 4x4 system. There were no noises, (popping, grinding, etc. ever) The vehicle has 104,000 miles on it and runs very well. Has anyone experienced this? From what I've read, this could be the rear coupler is bad. I have pulled the fuse, no change, replaced fuse, no change as expected. The shop I took it to, cleared some hard codes for wheel speed sensor, I believe, but could not find the problem. When put on the rack and placed in gear, the front wheels turned about 1 full rotation and then the back wheel started to rotate. However, I think that when there is resistance on the wheel it doesn't seem to get the power transfer to the rear wheels. The 4x4 light went out after about 15 - 20 minutes. It reappeared when I caused the front tires to lose traction. Any ideas on what may be the problem/solution would be appreciated. A new rear coupler is around $1600 for just the part.