It means Shift to Park (P Range) and is seen if you open the driver's door with the car on and in D. It was part of the up date the middle of last year or so...
Not sure what they were going for here, but I'll bet "Shift to Prange" wasn't it. Reminds me of that Python skit where everyone says "Splunge", because they think that's what the boss wants to hear!
I think this may be something new with one of the software updates. Or at least I don't remember seeing it before. Happens when you shift into gear while the driver's door is open (something I do to reverse down the driveway just enough that I can then apply tire dressing to the part of the tire that's down against the concrete when I do the rest).
Leaf SL 2011 to 2016, Volt Premier 2016 to 2019, and now:
2019 Model 3; LR, RWD, FSD, 19" Sport Wheels, silver/black; built 3/17/19, delivered 3/29/19.