Ok, I think I may know what's going on. I believe the key is in
lockdown.
If the transmitter on the key is operated more than 256 times beyond the range of the car, or with the car stored w/ battery removed, the next time the key is operated, the car won't recognize it.
This can occur if someone is 'playing' with the key, or if the key is being accidentally activated, say in someone's pocket, unbeknownst to the owner.
If this is the case, the procedure is:
- Switch ON the ignition with the key
Switch OFF ignition
Remove key from ignition
Press transmitter within 6 sec. of removing it
That should reset it, unless the key has been operated 1024 times or more in which case, only the dealer can reset it. Performing this procedure resets this function to zero.
I have no idea why such a function should exist. Perhaps it's a safeguard should someone find the key and try walking through a neighborhood or parking lot trying to get a car to respond to it. Unlucky you if the thief finds the car on the 255th try I guess...