So my 2018 Pacifica limited sat for a week (safe at home!). I tried to open it today and it had no power to anything, I needed to pop the hood to check the battery but the key inside the fob key would not unlock the door. The fob key itself had a battery, I tried both my fob keys. Isn't that what it's supposed to do, open the door? Or if I have a dead car battery (fob key had battery) I can't even open my door? If it is supposed to open the door with no power how do I get this fixed? Thank you!