I have a 2015 Mirage with the F.A.S.T system. All of the sudden whenever the drivers side door is opened the outside beeper and the inside warning indicator (yellow key with symbol) start alerting for 3 seconds. It does this if the regardless if I have the key with me or not and the only way it won't do this is if the ignition is in the ACC or ON mode. Otherwise the car works perfectly normal. Its kind of like it is a very annoying reminder to take your keys. Any ideas?