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2003 Honda Civic Question: p0401. Fault code. Have had the valve cleaned but fault came back need advice?

 

Question

Annemarie85, 1.7L 4 Cylinder, Tacoma, WA, January 13, 2014, 05:19
 Rookie

Hi I had the valve cleaned but the fault has come back as soon as i left the garage. I need a low cost option on what to do next. Do I replace the valve?. The car does make a pinning noise and is slightly rough on idle. This fault came after funning out of oil :( help

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  • Answer #1

    Tires Too (130 Answers) , Londonderry, NH - (603) 473-4287
    tires too January 13, 2014, 05:36
     Journeyman

    Are you getting vacuum to the valve? Carbon build up in the ports is a problem.

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    Annemarie85, January 13, 2014, 05:56
     Rookie

    Can I check this myself? As I live close to only one garage and they are charging me and not fixing the problem. Carbon build up in the ports? Is this on the valve? I've ordered a second hand valve.

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  • Answer #2

    Greg's Orange Auto (12248 Answers) , Orange, CA - (714) 361-9386
    globalhelper January 13, 2014, 06:02
     Master

    poss carbon build up in passages or bad valve

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    Annemarie85, January 16, 2014, 11:18
     Rookie

    Thanks for reply I've replaced the valve with a second hand part. It seems withe the garage did not clean the valve or I have serious engine problems. As I don't think it would take one week for so much carbon to build up the the entrance hole to be almost blocked.

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  • Answer #3

    AOTL from All On The Line, January 13, 2014, 15:26
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     Enthusiast

    Cleaning the EGR port passages will be required. Also inspecting the operating and resting voltage readings for the EGR valve will help diagnose the P0401 code.

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