crwdns2933897:0crwdne2933897:0

Why my car master lock not working(liberty 2005)

i have a subaru liberty 2005 its master lock not working ,all the door open by manually,how i can fix it and what the cost for fix this problem

crwdns2934089:0crwdne2934089:0 crwdns2934093:0crwdne2934093:0

crwdns2934109:0crwdne2934109:0

crwdns2853045:0crwdne2853045:0 crwdns2853046:0crwdne2853046:0
crwdns2889612:0crwdne2889612:0 0

crwdns2942205:01crwdne2942205:0:

Is it the Key Fob or the master locking switch on the drivers door?

crwdns2934271:0crwdnd2934271:0crwdne2934271:0

crwdns2934285:0crwdne2934285:0