suggest erasing DTCs see if they return as I woudnt have thought this would have stopped engine starting.These codes may have been in for a while.Had a similar experience with a 75 diesel where the communication from the chip in the key required reconfiguring to the relavant reciever of the vehicle This needed to be carried using MG ROVER T4. Therotically this cant happen but it did. Whill watch this post for an eventual fix. Cheers Geoff