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I changed my fac airfilter on my 1999 996 with 66k miles to a K & N and drove with no issues for about 5K miles until i got a CEL a couple of days ago. (P1128). After reviewing a some comments on this forum, i changed the airfilter back to the std factory type and also cleaned the ICV, butterfly valve and the MAF as instructed.

Following this the old CEL cleared and now get P0102.

I may have messed up the MAF while cleaning it. Should i replace the MAF to clear the CEL P0102 ? Wil that work? I have checked for vaccume and intake leaks and did not find any.

Any ideas? pls help!

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The problem with cleaning is that a specific active product, which is responsible for the air mass measurement, is applied on the element by a "vaporization" process (hot film).

Each contact with a cleaning product and/or swab would disappear a part of the active product, it may be that the CEL sometimes would disappear temporarily (is within the adaption range) but the air mass measurement will never be perfect, therefor a replacement is recommended by BOSCH/PORSCHE. I hope that the element operation is understandable.

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