This happens when the key out range, at least I think that's what you mean, if the key is out of range " key not found " comes up on the MFD. Essentially the whole process needs to start again. Switch off and restart this resets make sure the the key is in range ie not shielded by coins or phone or anything else. If all else fails put the key in the ignition and start and then turn off, this will get the cycle of events back on track...
