402 cel

[Kremithefrog]

Having trouble, especially on the new forums, finding information on this.
I have a 402 egr code.
I cleaned the egr hoses once which didn't help.
I have a gutted cat (soon to replace with a resonator type muffler) but I think I had codes before I gutted it.
I have msds headers and ypipe with MIL eliminators.
We tried to turn the EGR system off using the xcal2 but I'm still getting the CEL.
What should I start looking at and any easy test that can be done? The ford cd list so many things I don't know where to start and I figured there may be some common cause that is already known.
I'd love to have this taken care of before SZ. Thanks for any input.

 

[Marky]

DPFE. (abc)

 

[Rogerm60]

Disconnect the EVR electrical plug and replace it if you get vacuum at the EGR valve (it's leaking).

 

[BrApple]

P0402 - exsesive egr flow at idle is for the dpfe sensor

 

[Kremithefrog]

I got a dpfe sensor hopefully it'll fix it. I didn't want to spend the $50 but o well. Seems like this car can't go very long without some sorta sensor going out. If it ain't the dpfe, then I'll return it and look at the other stuff.

 

[Kremithefrog]

I think the dpfe sensor handled it. It usually comes back on by now and it hasn't yet. I think I know why it came on in the first place, but I don't think there is really a way to clean the dpfe.