I have a 1997 Range Rover 2.5 DSE Non starter due to code between Becm and Ecu being lost . Have visited dealer 3 times to have codes reinstalled. Each time I bring it home I open door with fob message centre states 'Alarm triggered' and will crank but fail to start. Battery loss then ensues . Everything else in vehicle is sound except drivers door must be opened with the key and actuator wont work with fob (Passenger door is the same). BECM was fully refurbed 8 months ago. Any thoughts would be appreciated as to the cause of this. On my last legs re this as I am going to sell as a non starter if not resolved. Thanks