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
– 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 Duty
2004-2007 Ford E-350, E-450
2003-2005 Ford Excursion
Ford Factory Service Bulletin OBDII Code P0404
When is the obd code mean?
An improper voltage signal is sent to ECM through the valve
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)
– Engine hesitation
– Engine hesitation
P0404 FORD OBD Code Description