A loss of park function can allow the vehicle to rollaway, increasing the risk of a crash.
The integrated park module may fail to lock into the park position when the driver shifts into park. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 114, "Theft Protection and Rollaway Prevention."
What to do: Book it in at your next service. There is no deadline and no charge.