You'll need to do a thorough diagnostic of the entire system as the problem can be with almost any of the components. Finding the real fix can be a PITA.
Here is my story of P0410/P1411: http://986forum.com/forums/general-discussions/41855-p0410-p1411-solved.html
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1999 996 C2 - sold - bought back - sold for more
1997 Spec Boxster BSR #254
1979 911 SC
POC Licensed DE/TT Instructor
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