P0401 EGR Low Flow DCT engine light

The engine light on my 2001 Tribute came on a few months ago. Not trusting Dealers I bought Auto Enginuity (www.autoenginuity.com) ScanTool OBD-II software and Connector ($220). I am very happy with the connector and the program. It allowed me read the trouble code and reset the engine light. Of course it came back on a short time later (expected). I also have the Dealers Repair Manual. I looked up the trouble shooting for P0401 and did a little research on the WEB. It appears that Ford has had problems with their Differential Pressure Feedback Exhaust Recirculation Valve. (DPFEGR). Most of what I read linked this trouble code to the EGR valve Pressure Sensor. (DPFEGR - samething). Right now it is a Dealer Only Part. I went to Mazda and learned that they have extended the Warranty on the part only to 70K and 7 years. As it turned out it was more of a hassle to leave the car and have them replace the part then it was for me to spend the $40 and do it myself. It takes about 5 minutes to switch the sensor out and most anyone should be able to do it. I reset the engine light and the trouble has not returned.

The engine light on my 2001 Tribute came on a few months ago. Not trusting Dealers I bought Auto Enginuity (www.autoenginuity.com) ScanTool OBD-II software and Connector ($220). I am very happy with the connector and the program. It allowed me read the trouble code and reset the engine light. Of course it came back on a short time later (expected). I also have the Dealers Repair Manual. I looked up the trouble shooting for P0401 and did a little research on the WEB. It appears that Ford has had problems with their Differential Pressure Feedback Exhaust Recirculation Valve. (DPFEGR). Most of what I read linked this trouble code to the EGR valve Pressure Sensor. (DPFEGR - samething). Right now it is a Dealer Only Part. I went to Mazda and learned that they have extended the Warranty on the part only to 70K and 7 years. As it turned out it was more of a hassle to leave the car and have them replace the part then it was for me to spend the $40 and do it myself. It takes about 5 minutes to switch the sensor out and most anyone should be able to do it. I reset the engine light and the trouble has not returned.


I have the exactly same problem but I dont know where to go to get the ERG sensor. Im curently overseas and most of the websites dont ship to APO AE address. Can you tell me where did you get your ERG sensor? thank you

I have the exactly same problem but I dont know where to go to get the ERG sensor. Im curently overseas and most of the websites dont ship to APO AE address. Can you tell me where did you get your ERG sensor? thank you

Right now this is a Dealer only part. So you will have to contact a Dealer. I don't know if there are Mazda Dealers where you are. You might try having a friend CONUS buy one at a Dealer and ship it to you. Sorry I'm not more help.

Where is that sensor located?
I think I had three put in already. Mine is an 01 with 67K.

I scanned the page from the manual with the directions on how to replace the EGR sensor. I am tring to post it here, but I have my doubts about if it will show up or if you will see a link to the file on my Hard drive. If this doesn't work. I can e-mail it to you directly. The sensor is near the oil dip stick.

/Users/steve/Documents/EGR 01-16-5.jpg

its locate near the firewall near the trans dip stick. Its the sensor that has a connector and 2 silicone hose connected to it.

As a follow-up. The engine light on my Mazda came on again last week. Using the Scantool OBD-II, I plugged into the vehicle and recovered the trouble code. P0442. Evaporative Emission (EVAP) Monitor and System Malfunction. Sounds bad doesn't it. The first Possible Cause listed... loose fuel cap. I reset the engine light and the problem has not resurfaced even after 30 cycles. (cycle - starting, running and stopping the vehicle.) The ScanTool has been worth every cent. Just FYI. Steve

Hello,

I'm having this problem myself and hoping to replace the part, but it would be really great if you could send me a copy of the instructions you mentioned in this forum: (http://www.automotiveforums.com/t449603-p0401_egr_low_flow_dct_engine_light.html)

Please let me know if you can. Thanks!

its locate near the firewall near the trans dip stick. Its the sensor that has a connector and 2 silicone hose connected to it.

Read this guy's quote.

Hi, How do you reset the engine light? Thanks

By disconnecting the battery and then reconnecting it. Use the negative terminal.

UPDATE:

You can reset the light using the code checker tool.

New part was installed for this error: P/N 4U7Z-9J460-AA

Internet purchase: $62.51 including shipping and (No) tax