ES will not shift into 'drive'
 

2016 ES350 gear shift will not go into 'drive' without depressing the 'shift lock' override. Shifter can be moved (with foot on brake) from 'P' to 'R' and 'N' but will not go to 'D', but on occasion it will operate correctly (about 50%). Otherwise car drives great and transmission shifts smoothly. Of course when I took garage for repair, they could not duplicate problem. Any ideas out there?