Hi folks, any advice on this one please.
I have a 2000 year 3.2 cab 996 and 2 keys, but only 1 key remote works correctly.
The other key will not operate the central locking etc but starts the car ok.
Ihave fitted a new battery, and the red light works. Ihave also tested the key on a diagnostic tool and it seems to be ok. What is wrong.

cheers.