Originally posted by garry:
They want $128.00 canadian dollars for the thing.



I'm assuming that includes labor...

Either way, you can buy the part for ~ $50 (U.S.) online and just do it yourself (if you are so inclined).

Originally posted by garry:
Am I on the right track.



A P0401 can be a variety of things. If the mechanic knows what he is doing and diagnosed a bad DPFE (differential pressure feedback EGR), then I might give him the benefit of the doubt.

As suggested above, the EGR passages (inside the UIM) that are behind the TB gasket are commonly a problem on our cars. I had a P0401 and that ended up being my problem (I found this out after I had replaced the EGR, EVR, and DPFE). Just remember to buy a new TB gasket if you do the work yourself.

Here are two threads that discuss the cleaning the EGR passages behind the TB gasket:

http://www.contour.org/ubbthreads/showflat.php?Cat=&Board=trouble&Number=10469

http://www.contour.org/ubbthreads/showflat.php?Cat=&Board=trouble&Number=10673

Here is a list of possible causes on a P0401 from the Ford TSP:

Diagnostic Trouble Code (DTC) P0401 indicates that Continuous Memory Self-Test has detected insufficient EGR flow.

Possible causes:
-- EGR valve stuck closed or iced.
-- EGR valve diaphragm leaks.
-- EGR valve or flow path restricted.
-- EGR vacuum hose off, plugged or leaks.
-- VPWR circuit open to EGR Vacuum Regulator (EGR V.R.) solenoid.
-- EVR circuit to PCM open.
-- EVR circuit to PCM shorted to PWR.
-- Differential Pressure Feedback EGR (D.P.F. EGR) sensor pressure hoses both off.
-- D.P.F. EGR sensor pressure hoses reversed.
-- D.P.F. EGR sensor VREF circuit open.
-- Downstream pressure hose off.
-- Downstream pressure hose plugged.
-- Damaged orifice tube assembly.
-- Damaged EGR V.R. solenoid.
-- Damaged D.P.F. EGR sensor.
-- Damaged PCM.

96 Contour SE Duratec V6 24-valve 2.5L ATX 108,000 mi. Replaced: crankshaft w/ DMD, EGR valve (clogged), EVR, DPFE, PCV valve, evap emissions hose & tube (cracked), window regulator (broken), LH & RH PCV tubes, UIM gasket (leak), ignition coil