Moderator note: Merged from a separate thread.
In short, if you have a front license plate and your tesla uses Ultra SOnic Sensors it can interfere with it and make the message come up. This is probably more so true if you're like me and didn't want to drill holes into the front bumper to use the standard plate holder, and bought the license plate holders that extend the license plate out about an inch or so from the front bumper.
I guess when i first installed it there were no issues, but now 10 months later it came up and was bugging the crap out of me. I ranted to SC about it, and dam near sold the car just because of it. They wanted to charge me 500 bucks to fix it. So there you have it, if you have tried soft and hard resets and tested to see if all the sensors are working fine and they are but are just clueless as to what's going on then try removing the front license plate and use a different holder for it.
MX 2016.