my remote central locking has stopped working on my 2002 Vauxhall vectra ( old style) i have put new battery in the key but still it won't work, what can i do next

sleepy, February 2009

assuming that the battery and the key fob is all good lock and unlock the car a couple of times with the key in the drivers door then turn on the ignition and push the lock/unlock buttons on your key fob up to 8 times then turn off the ignition and try to lock /unlock the car using the remote this procedure syncronizes the key remote to the car if the rolling code has been lost due to remote battery going flat

gtwannabe, February 2009