You dont need the code, you just need to re-sync the key. To do this -
ignition off
Press central locking button (on the dash or by the handbrake, NOT the remote fob) and hold for at least five seconds. Doors should lock then unlock. The immo light should stay on.
Within ten seconds, point the key at the receiver and push the key button twice, the doors should lock then unlock.
Remote should now work as normal.
laguna
November 2009