Hi, having a problem with my 54 plate vectra sri cdti, when you turn the ignition on it comes up on the centre display 'check safeguard'. Also the alarm used to go off intermittantly when locking the car, but i replaced the powersounder and it doesnt go off anymore. The codes i am getting in bcm are B2955 - anti theft warning system sensor datalink/horn signal malfunctionB3916 - powersounder malfunction. B3916 has now gone after replacing powersounder, but the other one is still present, any help is much appreciated!!