Sounds like the car is having a hard time acknowledging it is in park. All cars are required to have a neutral safety switch that tells the computer the vehicle is in park and its okay to start.
There could be an adjustment for the shift linkage. There could also be an issue with the switch itself.
〉 Answered on Dec 29th, 2014 by Helaine Kurot, Owner/Technician at 360 Automotive