CEL Code P2004?

Elemino

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Joined
Feb 27, 2012
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Location
Dallas, TX
The check engine light came on yesterday evening. I took the truck to Autozone and had them pull a code. He came up with code P2004 which their computer says is:

"Intake Manifold Runner Control (IMRC) stuck open bank 1. ECM has commanded the IMRC closed but detects it open."

So, first... WTF is an IMRC? lol I have no problem doing my own work, but I have no clue what this is, or where it is. Any help is GREATLY appreciated!
 

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