2005 Ford Focus intake manifold runner control

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My husband's 2005 Ford Focus check engine light came on and we had it analyzed by our local AutoZone who came up with OEM #P2004; Definition: intake manifold runner control stuck open bank 1; Explanation: ECM has commanded the IMRC closed but detects it open; Probable cause: 1) short circuit condition, 2) damaged IMRC actuator or solemoid, 3) blocked vacuum hoses. I have tried looking for this repair on several sites, but have not come across it yet. Any ideas? I would like to have an idea of how much money we are looking at to repair this. Many thanks!!!