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 chapter 24

Symptoms
check engine light (P1409)

Fix
replace EVR solenoid

Tests shown
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 computers control of the EVR solenoid
how to verify wiring integrity

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

Playlist
(Chapter 24) EGR Flow and System Tests
   • (Chapter 24) EGR Flow and System Tests  

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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.