If the shift lever were to come out of "park" while the vehicle is parked on a non-level surface, the vehicle could roll increasing the risk of a crash.
Power Train — Automatic Transmission — Park/Neutral Start Interlock Switch
Vehicle description: Passenger vehicles equipped with an automatic transaxle. The shift lever appears to be in "park, " but can easily be moved from the "park" position without the use of the key, transaxle lever detent button, or depressing the brake.
Dealers will replace the shifter assembly. Until the vehicle is serviced, owners are advised when shifting to "park, " always apply the park brake before releasing the service brake.