Possible causes – EGR volume control solenoid valve– EGR volume control solenoid valve harness is open or shorted– EGR volume control solenoid valve circuit poor electrical connection– EGR temperature sensor and circuit Tech description There is a factory service bulletin for the following Ford models: 2003-2007 Ford F-Super Duty2004-2007 Ford E-350, E-4502003-2005 Ford ExcursionFord Factory…