Ok help needed please,ive got the above fault yet again even after having the dodgy pipe replaced with the new one which i thought had fixed it as the light hadnt appeared for over a week,the car is still funning fine NO problems what so ever so any ideas what the hell is wrong and how to fix it as its starting to get a bit annoying!

Cheers

Did You Get The Valve Changed As Well As The Pipe?

no just the pipe at the moment