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MIA997TTBeast

Code P2004, what it really means?

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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.

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