Bought a used 2012 XLt, drove it across the US and had problems 300 miles from home. Limped in but made it. The code that came up indicated a "stuck D Shift Solenoid" which could be that or a long list of other things. I had the fluid changed and filter cleaned at my destination but after checking it back in NM, it was obviously old and had not been changed. Watched a few YouTube videos and pulled the pan off and ordered three solenoids to replace. It's recommended that all old ones that are being reused be demagnetized and flushed out if you can find someone to do this. Afterwards, the TCM needs to be wiped (memory) so that the transmission can relearn it's shifting patterns so it needs to be driven slow and easy for a day or so avoiding any jackrabbit starts and peddle to the metal stuff. This is relatively inexpensive and fairly easy to do. Next step if this does not work would be changing the computer, perhaps a used one. Keeping my fingers crossed that this fixes things or it's off to find a used transmission.
