DPFE Sensor

[Rasp]

07 Ford F150 6 cyl

I want to check the DPFE Sensor's reference voltage but I don't know how to get the clip off the DPFE sensor. Any ideas out there. does it just pull off or is there some other procedure. I don't want to break the electrical connector.

[Davescort97]

They put the clips on at the factory to make sure thy don't come loose. Spray some WD 40 on it and slip a small screwdriver down the sides to break it loose. There is a connector tab that will have to be raised up to get the the connector loose.

[Rasp]

I will try this it just feels like cheap brittle plastic that will break if I try and force it. I think I see the tab that needs to be raised but I bet it breaks.

[Rasp]

Ok I got the connector off without a problem. I also checked the reference voltage on the connector and I get 4.1 volts. So it is within the guidelines.

Now I need to backprobe the sensor. How do I backprobe the sensor? I assume that means I need to plug the connector back in and check voltage from the sensor's behind? But....
I don't see anywhere I can input the leads to check the voltage.

The reason why I am doing all this in the first place is that I'm getting a code saying the EGR valve is bad. I have sinced replaced the egr valve but I still get the code even after I have cleared it.

So I have checked the egr vacume regulator and now I'm checking the DPFE sensor.

Anything else I should check?

[Rasp]

BTW the plastic tab does not raise but it instead gets squeezed. that did the trick to get the connector off.

[way2old]

What is the code you are getting? P0401 or a P0402??

[Rasp]

I was getting P0401. When I had this code on my Buick it was the EGR Valve and that was that.

But...

The truck must have something else at issue here.

[way2old]

Ford's are famous for a bad DPFE sensor to cause that code, and they also clog up the EGR port in the intake. Did you clean the ports really good when you changed the EGR?

[Rasp]

I thought I did. But maybe I should recheck that again anyhow.