I have a 1994 xantia and 2 keys for it, but only one of the keys work with
the remote. I have tried reprogramming the other key by:
ignition on 1 click
point key at the IR receiver
hold top button for 5 seconds
hold bottom button for 5 seconds
turn off ignition
This sort of worked, it made the 'new' key work, but the old key which was
fine before stopped working (by IR). I guess what I did reprogrammed the
car to accept codes from the new key instead of programming the new key to
work with the car.
Does anyone know if it is possible to reprogram the new key so that both
of them work, or is reprogramming the chip in the car all I can do?