Volvo Repair: seconardy air injection system, hurricane charley, sw florida

Question
I have a 1997 850 GLT Turbo B5254 and I have a code PO410.  Can you give me a statring point to look for the problem.

Answer
First, sorry for late response.I am in SW Florida and if you do not know we were just hit by  Hurricane Charley Friday and I just got power 30 minutes ago.

I am not familiar with the generic codes.if I knew what the code meant I might be able to.I will try to cross reference it at work