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Answered 2011-09-12 21:12:55

As you may know the key can normally be re-programmed to the central locking by turning on the ignition and pressing either of the buttons. If this fails there are two common faults 1/ the battery holder inside the key has come off of the printed circuit board (if you pack the key with tissuse paper to hold the battery tight this gets over that problem. 2/ the key has lost its connection to the computer and will need to go to a vauxhall dealer to have it programmed, they use a machine called tech 2 and to programme that or any key they will need the immobilizer (security) code number. this was originally supplied with the car at time of purchase. If you have lost it a Vauxhall Dealer can get a new code but this is not cheap.

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