» » »

Honda Q&A

Ask Your Question

2003 Honda Civic Question: I keep getting a P401 code EGR flow insufficent on my 2003 honda civic 1.7

 

Question

diddy1959, 1.7L 4 Cylinder, Roxboro, NC, February 23, 2012, 17:41
 Rookie

I have cleaned around the EGR port several times but still getting the code. After cleaning I can run the car for about 30 minutes but will still get the code. I have even bought a new one but still getting the code. What else could be wrong.

1 Answer
Flag This
  • Answer #1

    mastertech6371 February 23, 2012, 19:22
    Profile_thumbnail
     Master

    the amount of vacuum to the valve. hondas are common for carbon clogging the vacuum ports to the egr. have a shop verify this.

    Roy

    Flag This
  • Reply

    diddy1959, February 24, 2012, 09:11
     Rookie

    What ports are you talking about this only has an electrical connection to the top of the valve..

    Flag This
  • Reply

    mastertech6371, February 24, 2012, 10:14
    Profile_thumbnail
     Master

    when you remove the valve, there are 2 ports. one is exhaust and one engine vacuum. the engine side tends to clog badly with carbon.

    Roy

    Reply
    Flag This