Have a 2003 2.2 diesel Ulysse and have a problem with one of the key fobs.
We have two keyfobs with the lock unlock buttons. And one started to show signs of low battery. ie only worked when very lose.
Replaced the battery and it seemed to be fine. However the next day it refused to work. No lock or unlock. Whats strange is the other keyfob that normally works fine won't work if you've tried using the seemingly duff fob.
You have to manually unlock (and suffer the alrm going off) and tunr on the ignition then off again. Now the working fob will work fine tl you try and use the other fob then the good one is locked out.
Any thoughts anyone? Does seem strange.