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Code P2004, what it really means?

MIA997TTBeast · 2010-11-15T21:49:42+0000

I'm getting this code, that of course trips the CEL almost every other 100 miles or so. Using Durametrics software thi si what I get, P2004: Catalyst system efficiency below threshold bank 1 Value below lower limit value I do have the extension bungs in my Tubi Race exhaust. I do know that because of the lack of catalytic this is supposed to happen, BUT shouldnt it be the after catalytic sensor? According to the ODB codes section of this website, I should be getting this, P2235: Oxygen sensor behind cat. conv. bank 2 P2232: Oxygen sensor behind cat. conv. bank 1 Any explanations? I know Loren, might know why.