Not sure if this is in the right spot or not for this, but I ran a code on a car that came up with a PO412 code. The whole Secondary Air Injection System Switching Valve A Circuit Malfunction thing. I have searched and searched and cannot find anything about it to tell me exactly what that problem means. So I came here where I've gotten a lot of help for my truck. It's a 96 Merc Sable, but I was hoping that since it was still a ford and the codes are universal that someone could give me some explaination as to what that code means and what I'm looking at.

Thanks in advance to anyone who can help out!!