po410

Hi guys, i'm sure this has been covered before but i keep getting the engine light on despite a new air pump fitted and replacement changeover valve but my question is, does anyone have a diagram of exactly how and where the change over valve plumbs into as I think maybe I have a hose missing or...

Im getting a PO 410 code popping up on code reader . After clearing code it stays off for about 200mile but comes back on. It relates to secondary air intake ! My car is the E55 W211 on a 2003 Any ideas ........car runs fine even with code present .