Likely an intake manifold runner control issue. Check for vacuum leaks first, and then the various components (actuator, connectors, etc), for continuity and/broken faulty connections. Good luck.
〉 Answered on Feb 25th, 2013 by Karen Salvaggio, Owner/ Editor Thunder Valley Racing and Professional Race Car Driver at Thunder Valley Racing
Paula, normally when the check engine light's on, there's something wrong. It could be big or small, but I encourage you to get it looked at by a trusted professional. According to the CarMD database, the fix that best matches the P2008 code for a 2003 Ford Focus is "Replace Intake Manifold Runner Control Valve (make sure the vacuum lines on the IMRC valve are good first). But the only way of knowing the true problem is to have it diagnosed in person. Best of luck, Kristin Brocoff, CarMD. www.CarMD.com
〉 Answered on Feb 25th, 2013 by Kristin Brocoff, Director of Corporate Communications at CarMD.com