By using this special function it is possible to read/write the flash memory of some engine control units. For some engine modules it is also possible to read/write the Configuration memory. It is important to note that if when you start to re flash the Flash memory of an Engine Control unit for some reason the process does not finish successfully - you can always restart the flashing process. Always make sure that there is a good power supply connected to the battery of the car! Otherwise, the fan of the Engine moves very fast during reading/writing and it may drain the battery very fast