So, I have this issue (Parksense disabled when I installed the tune), re-installing the original tune wouldn't clear it. After researching what's available I went with Appcar installed on a PC. I was successfully able to find and clear codes with it, but to my surprise there were no DTC codes for the PTS module. I believe the problem is with the PAM Park assist module, which this program doesn't show as accessible. When I go into the onscreen menu in the truck and check the box for Park Assist, it unchecks itself.The issue is not the engine tune itself. Anytime you flash on the 2016 WK the parktronics module sets Loss of Communication with PCM and won't work again until you clear the code, for whatever reason the PTS software used in this module year won't heal this code on its own like the others.
You just need a code reader sophisticated enough to communicate with the PTS module and clear the codes out of it then all is good.
I'm going to uninstall and try the dealer next, unless anyone has tips on how to access/clear codes from the PAM.