Vauxhall Meriva door open alarm bleeps continuously when all doors are closef

Open and close bonnet firmly as there is a sensor there also which sometimes causes problems and MAY cause this . Otherwise you may have to scan it with Tech 2 /3 to identify which door sensor is triggering the alarm as the micro switch is built in to lock assembly . Have seen some where banging door shut has cleared sticking switch as has spraying the likes of WD 40 into the lock assembly .