something about battery running low on your key fob do you have your manual i'm sure it says something in there.
Change the battery in the key fob then you have to 'resync' the system, if that fails i believe you have to disconnect the car battery for a few mins then when you reconnect all should be ok.
Yes it means low battery in the fob, it's covered in the handbook. You can confirm by trying your other fob (assuming that hasn't got a low battery too!).