Yes I'm Sure. If you do a web search for that code, you'll find that it's out there. I found one on a Mazda site that describes it as "Variable Tumble Control system shutter valve stuck open" what ever that is.
I found another at stangnet.com. It describes the code as "Being associated with the charge motion control valve(CMCV), actuator motor, and/or linkage concerns." But that was on a 2005 Mustang, 2006 Explorer and 2006 Mountaineer.
I did a search on Google using DTC P2004 as my search item.