Wally68

Hi all, my airbag light popped on. Also noticed when passenger is in seat the airbag is off in passenger. Code B0052 pulled up, the mechanic is saying to put in passenger belt buckle. If that doesnt work replace OCM? Could the passenger belt buckle cause both issues (dash light on and passenger airbag off). Does seatbelt need to be fastened for passenger airbag to go on? He also said something about a weight sensor in set ugh... Thanks for any help!!