I have no idea what you typed in your post!
The DPFE is a re-engineered one and they can be bought at the dealer for $140.00. You can't get them anywhere else.
Check to make sure the hoses didn't come off of the sensor itself.
P1401 is usually caused by excessive exhaust backpressure or a restriction of the orifice in the EGR tube. It can also be a defective DPFE box.
Also do a search in the trouble shooting section.
Here are some links.
P1405 P1405 #2