NHTSA Complaint #11529980 — 2017 CHEVROLET VOLT

The car was been driving, shifting, and turning off normally for 10 months. Then last week, I started to get a "Shift to Park" message on the dashboard when I tried to turn off the car. On all occasions, I was stopped and the shift gear was in park, but the car kept running. I could not get the "Shift to Park" message to stop. I finally had to hit Power again, shift the car from park to drive, then return it to park. After a couple attempts, the electrical system changed to "Park." This has now happened over 10 times. I'm concerned at some point the trick will stop working and I won't be able to power off the car.