DTC P1707-77: Transfer Case Neutral or Park/Neutral Indication Circuit - Commanded position not reachable: Action

Check the integrity of the emergency park release. Rectify as necessary
Check the integrity of the parklock mechanism. Using the manufacturer approved diagnostic system, clear the DTCs and road test the vehicle. Check the parklock mechanism by engaging and disengaging the parklock several times. Rectify as necessary
Using the manufacturer approved diagnostic system, clear the DTCs and retest. If the fault persists, install a new transmission control module