Copy & Paste link below http://www.tomco-inc.com/Tech_Tips/ttt36.pdf
One symptom of a 2003 5.4 liter Expedition when the DPFE sensor goes bad is the engine light stays on constantly. Another symptom is exhaust back pressure causing the vehicle to chug slower at speeds of 35 to 40 mph.
P1401 is DPFE sensor circuit high, check out this tutorial to replace the sensor on your Ford
P1405 Ford - DPFE Sensor Circuit Upstream HoseProbably caused by Faulty DPFE sensor (EGR pressure sensor), or a plugged EGR tube
On my 1995 Ford Explorer with the 4.0 liter OHV engine the DPFE sensor ( differential / or delta pressure feedback Egr sensor ) is located on the upper intake manifold on the drivers side of the engine
Ford is the only American car company that uses a DPFE sensor. GM dpfe sensor are built into the EGR.
On the right rear of the engine by the throttle body.
Possibly the DPFE sensor(?)See "Related Questions" below for more detailed information about the EGR / DPFE combo
I dont believe the Impala 2003 uses a DPFE sensor as part of there Emissions system.
YES - www.motorcraft.com lists a DPFE sensor for all available engines on a 1996 Ford Ranger
Where is the DPFE sensor located in a 1999 Ford Exployer? I had my oil changed yesterday and was told that the hose connected to this sensor is off.
yes
The DPFE sensor is a totally separate sensor. Look for the feed pipe to the EGR valve and follow it towards the exhaust. Somewhere along that line you will see two small pipes leading to hoses, that lead to the sensor.