The DPFE is located on the upper intake manifold. As soon as you open the hood you will see it in front of you. It has two air line hoses and an electrical connection. It is connected to the manifold with two 8mm screws.
It's on the passages side toward the rear. The two rubber hoses go down. One goes to the exhaust manifold and the other to the intake manifold. Its black and about 4in x 1 1/2in and being held up buy a metal bracket. Make sure you change the hose on the intake side(left) because if there is a air leak hot gasses will come up from the exhaust side and melt the DPFE sensor.
YES - www.motorcraft.com lists a DPFE sensor for all available engines on a 1996 Ford Ranger
yes
Ford is the only American car company that uses a DPFE sensor. GM dpfe sensor are built into the EGR.
According to www.motorcraft.com - YES !
P1401 is DPFE sensor circuit high, check out this tutorial to replace the sensor on your Ford
On my 2000 Ranger it was sitting on top, easy to get to. There is a tube that runs from the exhaust manifold to the intake manifold, on that tube is two tubes that run to the EGR(DPFE) pressure sensor(I think that is what you mean). Follow the two tubes to the pressure sensor. Hope this helps!
The speed sensor on a 99 Ranger 2.5 liter 2WD with an automatic transmission is in the rear differential. It is included with the ABS sensor in one unit.
On the 4.0 L - OHV engine , the DPFE sensor is on the drivers side of the engine , mounted below the idle air control valve
NO
I dont believe the Impala 2003 uses a DPFE sensor as part of there Emissions system.
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P1401 - Differential Pressure Feedback EGR sensor ( DPFE ) circuit high voltage detected