The testing procedures shown in this video can be applied to any Ford, Lincoln or Mercury that uses a vacuum controlled EGR valve combined with a Delta Pressure Feedback EGR sensor (DPFE).

The vehicle being tested is a 2000 Ford Expedition with a 5.4L engine.

Engine Performance Diagnostics chapter 24

Symptoms : (typical)
- Check engine light (P0401 Insufficient EGR flow or P0402 excessive EGR flow)
- possible detonation or pre-ignition "pinging" complaints
Fix: (common problems)
- faulty DPFE sensor
- restricted intake passage for the EGR valve (the exhaust side of the EGR is almost never the issue, only the intake side will plug up with carbon)
- remove EGR and throttle body for typical cleaning of the passages

Testing procedures shown:
- How to identify solenoid circuit design (power or ground side switching)
- How to manually energize the EGR solenoid (EVR) and force the EGR valve to open
- How to determine if the EGR passages are clean
- How to test the DPFE sensor for proper operation
- How to test the computer transistor driver for the EVR solenoid

Tools used:
- Scanner (Solus Pro)
- OTC 3633 Mini Circuit Tester
https://www.jbtoolsales.com/otc-3633-...
- Deluxe DMM w/Amp Shutters (AES# esi-582)
http://www.aeswave.com/cart.php?m=aff...

Related videos:
Faulty DPFE sensor    • Ford EGR flow quick test (P0401) DPFE...  
Plugged EGR passage    • How to test for EGR flow problems (GM...  
P0405 Case Study    • P0405 EGR Sensor A Circuit Low (faile...  



Playlists:
(Chapter 24) EGR Flow and System Tests
   • (Chapter 24) EGR Flow and System Tests  
(Chapter 8) Pressure Sensor Testing, MAP, BARO, DPFE, fuel tank and rail pressure sensors
   • (Chapter 8) Pressure Sensor Testing, ...  
(Chapter 3) Transistors, Solenoids, Computer Controlled Output Testing
   • (Chapter 3) Transistors, Solenoids, C...  

For more information on this topic, I have written a “field manual” called Engine Performance Diagnostics which is available at www.scannerdanner.com as an eBook or paper book.
Want even more diagnostic training? Whether you are a DIY trying to fix your own car, someone looking to become an auto technician, or a current auto technician that wants to get more into diagnostics, subscribe to ScannerDanner Premium https://www.scannerdanner.com/join-sc... There is a 14 day free trial.
On ScannerDanner Premium I will bring you right into my classroom at Rosedale Technical College. You will find page for page lectures taken right from my book as well as exclusive classroom type case studies. What is so special about these classroom case studies? I pull live problem vehicles directly into my classroom and we troubleshoot them in real time, using and applying the theory and testing procedures we learn during the classroom lectures. There is no better on-line training of how to troubleshoot automotive electrical and electronics systems anywhere!

Disclaimer:
Due to factors beyond the control of ScannerDanner LLC, it cannot guarantee against unauthorized modifications of this information, or improper use of this information. ScannerDanner LLC assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. ScannerDanner LLC recommends safe practices when working with power tools, automotive lifts, lifting tools, jack stands, electrical equipment, blunt instruments, chemicals, lubricants, or any other tools or equipment seen or implied in this video. Due to factors beyond the control of ScannerDanner LLC, no information contained in this video shall create any express or implied warranty or guarantee of any particular result. Any injury, damage or loss that may result from improper use of these tools, equipment, or the information contained in this video is the sole responsibility of the user and not ScannerDanner LLC.