I have a grand voyager which im getting an unlocking problem with, every so often my keyfob will not open the car but i can get in with the key but i still carnt start the car. please help me my wife is going garety at me.

 

Are your payments up to date? We had a lady on here whose finance company trashed her car with a remote box when her payments were late.
Is your battery well charged?
Sometimes if you have too many keys on your keychain, it will confuse the anti-theft element of the key fob. Try it without any other keys nearby.
Replace the battery in the remote.