Engine light stays on
 

I bought a 1998 Boxster & my light stays on ,I had it on the machine these codes came up? P0 410 Secondary Air Injection system malfuction, PO 154 Oxygen Sensor Circuit No activity detected bank 2 sensor 1. My buddy had this on his laptop he figures it's a vacuum leak? Can someone give me some ideas on how to fix my baby?
regards,R

IMO, it sounds like the O2 sensor. You can replace all the O2 sensors inexpensively if you maintain the connectors you have and do some light resoldering on a generic unit, do a search in here and you will see what I mean; I think the generics are for VW's not sure on that one.