I've had a few occasions when my fob wouldn't unlock the car, or open the hatch and the door wouldn't respond to pressing the handle black button. My impression is that the computer had gone off in the weeds, roaming around looking at all the sensors and trying to figure out where it was, until if finally rebooted, settled back in doing what it was supposed to do. This usually took just a few minutes. Not enough time to decide what to do about it, but disconcerting while it was dead. This appears in other functions that go goofy for a while, then heal up and everything's okay again. On the good side, it has never appeared to affect the steering, lane keeping, engine operation or other critical functions. Doesn't seem to be dangerous. I've just adjusted to regard it as charming eccentricities, rather like my wife. Whom I also loved dearly, like my Stinger.
