swapped instrument cluster - car wont start - 2011 GT

on my 2014, the PATs transceiver is connected to the instrument cluster which then communicates with the ECU to start the engine. Maybe the ECU doesn't like the new ECU. Probably the same for 2011. Check on the forscan forum, and post there. Forscan software is able to PATs programming on some cars and it can modify the as-built of the instrument cluster if that is the problem. but you'll need an ODB adapter.

meant "Maybe the ECU doesn't like the new instrument cluster"