2003 Hyundai Sonata PO401 check engine code

2003 HYUNDAI SONATA
101,000 MILES • 4 CYL • 2WD • AUTOMATIC
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TOODOG733
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  • 1 POST
After researching many articals on this trouble code (PO401) EGR insuffient flow I was first lead to believe a bad EGR valve or actuator solenoid was at fault. Then I came accross some information on the differential pressure sensor EGR (DPFE) a thought it may be to blame. All the articals I could find were on Fords and I have a Hyundai. My question is, do all cars use a DPFE sensor, specificly does my 03 Hyundai Sonata have on and where is it located, and what do you think I should do first.
Sep 15, 2008 at 2:41 PM
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RASMATAZ
  • ✓ASE Certified Mechanic
  • 75,992 POSTS
  • ASE Certified Mechanic
Clean out the EGR valve/passages and make sure its getting vacuum thru the vacuum solenoid
Sep 15, 2008 at 2:51 PM
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