Got receipt saying secondary h02s12 (heated oxygen sensor-bank1 sensor2) anyfix?

The code definition sounds pretty vague.If it is a circuit code than it could be several things.And if it were an air fuel ratio lean or rich code than you need to diagnose further for a root cause.I have never replaced an o2 sensor for a lean or rich code,but auto parts stores ALWAYS sell customers on o2 sensors when they get these codes.Get us the actual code # and we'll help.