CODE PO401, CHECKED EGR VALVE W/VACURM TESTER, HOLDING PRESURE, WHAT SHOULD I CHECK FOR NEXT

  • Tiny
  • George RRRR
  • 1996 Toyota Corolla
  • 164,000 miles

Checked egr valve working fine

Friday, March 2nd, 2012 AT 4:25 PM

2 Answers

  • Tiny
  • rasmataz
  • Member

Check the EGR valve transducer and the vacuum switching solenoid

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Friday, March 2nd, 2012 AT 4:28 PM
  • Tiny
  • Wrenchtech
  • Expert
  • 19,541 posts

Also check for a plugged passage in the intake manifold.

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Friday, March 2nd, 2012 AT 4:32 PM

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