52 is cause you disconnected n reset battery. 46 is low side sensor AC. your most likely low on freon. i would STOP disconnecting and reconnecting battery to get ac... as its DESIGNED to prevent you from killing your compressor... ( EXPENSIVE REPAIR ) just because you need freon. to help further, where are you from... and what year / make is the car. if it's R12, it's still available, if its R134a its readily available.... no reason to keep it low like that.