But My problem is similar. If I turn on the car starter, I can then put a dead key in with it started and drive no problem. If I turn off the car, it won't restart the car unless it is the one remaining good key. But yes, your car starter just has a bypass on it since these keys have the microchips in them. The bypass and the microchips are not lining up somehow. They both must be the same to communicate with the computer. I imagine if you put the key in, your theft light blinks and as you said nothing happens.