My car has experienced this problem again today. Exactly the same as before. The only additional information I can provide is that the blue gauge lights in the dash were stuck on when the car was locked. The security light was also not flashing when locked. The car has now "fixed" itself and starts fine. The gauge lights were off and the security light was flashing when I went to start it. It was over 12 hours from when it wouldn't start this morning. I had tried it about 8 hours after it wouldn't start and it was still not working then. My feeling is that the car immobilises itself and then takes 12 hours for it to reset the lock down on the immobiliser. Can anyone confirm if there is a lock down time for the immobilisers and if so is there anyway to over ride it? I really need help with this. The car is about to run out of warranty.