hi, i only have the blue non remote key. cant see why a loose or faulty battery earth lead would cause the immobliser to cut in.when engine cuts out while driving dashlights are still on & engine will turn over, just wont start( immobliser light on). disconnected live lead, waited 5 mins or so, sometimes car will start sometimes it wont. cant i just bypass the immobiliser. forgot to say, brand new battery fitted last month . thank you for info/help. steve.