Wells Ford EGR DPFE Training with Sgt. Tech P0400, P0401, P0402,

http://www.wellsve.com/ This video demonstrates how a Ford EGR, with a DPFE sensor, system functions. It also shows specifications for testing the system and sensor. Including check engine light codes P0400, P0401, P0402, P1408 what they mean and common causes. Why wells EGR valves and DPFE sensors are the best.

Category:

Autos & Vehicles

Tags:

• EGR
• Valves
• digital
• analog
• egr vacuum regulator
• DPFE
• sensor
• Wells
• Sgt Tech
• P0400
• P0401
• P0402
• P1408

[MsMlarrea]

Thanks for your quick response. is this test something i can get done over at like Auto Zone or do i need to purchase an electrical tester? or is there a different way to test the connector?

thank you.

[markjhicks]

@MsMlarrea I am not sure if AutoZone can do it or not. I think they only test components off the car and that is also limited. they do have a loaner tool program and maybe you can use a meter that way.

Mark Hicks

Wells Vehicle Electronics

[MsMlarrea]

Hello,

I removed the PDFE sensor and shook it against palm of hand and it had a little bit of clear water, not slimy or dark. Not sure what to make out that. Do you think this is the reason of the P1401 error code? Also the sensor connector does not stay tightly. As always thanks for your quick responses.

[markjhicks]

@MsMlarrea Because of the extreme change in temperature between the exhaust and engine, it is not uncommon to get moisture in the DPFE. However, this moisture does a lot of harm. I would first make sure the you have a good connection and see if that takes care of the light. If it does not, turn the key to the "on" position and check the voltage on the signal wire from the DPFE if it is over 1.2 volts it is defective.

Let me know the results of the testing,

Mark Hicks

Wells Vehicle Electronics

[MsMlarrea]

Hello,

I have a 2001 ford expedition 4.6 engine size. So far, I've changed the the EGR valve and the DPFE sensor. The codes went away for a week or two. I now have a new code P1401 DPFE Sensor Circuit High Voltage-02. Is it the actual culprit? or what is your advise. Thank you for your input..

[markjhicks]

@MsMlarrea

3. Check for a possible backpressure issue which may be damaging the sensor because of exhaust heat melting the sensor internally. To check this, connect a vacuum/pressure gauge to the DPFE sensor tube that connects to the sensors "HI" port. Monitor the reading while brake-torquing the engine. Backpressure should not exceed 2 PSI.

4. If the DPFE sensor connector is ok and there is not excessive exhaust backpressure, replace the DPFE sensor.

Let me know,

Mark Hicks

Wells

[markjhicks]

@MsMlarrea 1. Inspect the connection of the Differential Pressure Feedback EGR (DPFE) sensor for good contact to the sensor.

2. Check the Brown/White (BR/W) wire for 5.0 volts to the sensor when the Differential Pressure Feedback EGR (DPFE) sensor signal reading is high, and, that the Grey/Red (GY/R) wire is a good ground.

go to next response

[markjhicks]

@MsMlarrea I will need the year, make model and engine size of your vehicle to help. Please include the codes again with your reply.

Mark Hicks

Wells Vehicle Electronics

[MsMlarrea]

I changed the EGR valve and still getting same P0401 error code. Took it out and reinstalled it and still getting the same error code, along with a P1450 error code Inability of Evaporate Emission Control-Bleed Fuel Tank. Please help?

[markjhicks]

@weail LOL getting you an F15 ... Now that might be a challenge! Thanks

Mark