I had this same problem, and used the button in the steering column for some time, to remove the key. Yesterday I pulled off the center console cover and pulled apart the wiring harness leading to the shifter sensor. Inside I found residue that appeared to be Diet Coke...LOL. Once that was cleaned and a little wd-40 into the connection, everything is working perfectly. Needless to say, the wifes not allowed to drink in the car anymore....lol.