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In this video I will be addressing a P1409 fault code (EVR control circuit fault). Within the process of diagnosing this EVR solenoid fault, I will show you how to test the entire EGR system.

Engine Performance Diagnostics chapters 24

symptoms 50

  • check engine light (P1409)

fix 50

  • replace EVR solenoid

test shown enh 50

  • how to test for proper EGR flow
  • how to test the EGR valve itself
  • how to verify vacuum supply from the EVR solenoid to the EGR valve
  • how to test the EGR valve regulator solenoid (EVR)
  • how to test the delta pressure feedback sensor (DPFE)
  • how to test the computer's control of the EVR solenoid
  • how to verify wiring integrity

Tools used

  • scan tool
  • labscope
  • incandescent test light
  • backprobing pins
  • vacuum gauge
  • digital multimeter

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Playlist

(Chapter 24) EGR Flow and System Tests

Related videos:

How to test an EGR DPFE sensor (EGR flow test) - Ford, Lincoln, Mercury :

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Ford Ranger EGR Flow Trouble Code P0401 (DPFE fault):

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How to test for proper EGR flow (restricted intake passage) - Ford :

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Ford EGR Flow Testing (P0401, P0402, P0405):

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end faq

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For more information on this topic, I have written a “field manual” called Engine Performance Diagnostics which is available 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. 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!