You turn the key to the ll position or second click and press the remote pad to open the car. The central locking and indicators for the immobilizer should activate and that is the key programmed. Hope this helps.
you get 3 mins to change the battery.
found this answer on this site and it worked for me "if you have replaced battery in remote key fob put key in ignition then turn to position 1 the press the buttons on the fob a few times. this simply resets the fob to the car then all will work as should do "
take key to dealer for programing they will need also info about car,new key maybe £40
For Omegas, put the key in the ignition and press one of the buttons within 30 seconds- the doors will lock and unlock. For Omegas, put the key in the ignition and press one of the buttons within 30 seconds- the doors will lock and unlock. This also works for older Vectra models
I had the same problem on my Vectra B. Mine had refused to turn and I used Graphite powder and played with the key until it turned. it come in a little "puff pack"
Low battery voltage of remote key.
because it's dirty, just tace a soft fabric and some jewel polish and clean it
Even if the trunk release is broken, the external key lock should be able to open the trunk.
you shove it where the sun doesn't shine
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.
take the thug approach and rip the door off
If its vectra b to reset ECU you have to turn key so all display leds light up then off and do it 8 times if i remember rightly, this resets ECU to factory settings.