skreem will read vin from ecu and if not correct vin will shut down ecu i think you can leave the key in the on position for a certain amont of time and it will clear vin but must use battery charger when doing so i think its like 3 hours but vin must be programmed into ecu but it has to be cleared first and dealer can enter new vin there is a company that you send ecu to and they can clear it maybe eurocharge can do it, worth a call