P1432 Secondary Air Injection System Incorrect Flow Detected

I thought i would post this to try and help out other people with similar fault.
First off last year I got fault code p0171 with management light on,so i went searching and found egr start fan had exploded,so I changed that,cleared code and it seemed o.k for 2 days but then it came back on
so checked it was the same code,yes it was so went looking again and found the crankcase breather hose had turned into Plasticine,so i changed that cleared codes again spot on the light stayed off,until last week mil back on (same code again) so after more searching and checking of hoses i found the disa valve diaphragm was split (you have to look carefully to see it) through where the bar goes in but it was there

Google is your friend.