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P0404 code

Discussion in 'Wrangler JK (2007-2017)' started by Davidlu1971, Jun 19, 2019.

  1. Jun 19, 2019 at 4:49 PM
    #1
    Davidlu1971

    #1
    Davidlu1971 [OP] New Member

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    Hello all,

    I recently received a p0404 code and replaced the EGR valve. The garage removed the code but it came back on again. Any idea what else there might be? I did have the slight smell of gas when I would cold start it but that has been the only sign that I could compare to a stuck valve.
     
    Davidlu1971, Jun 19, 2019
    #1
  2. Jun 20, 2019 at 6:44 AM
    #2
    Awrench

    #2
    Awrench Well-Known Member

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    the light is on ?
    If its on get a scan and post ALL codes. Scans are FREE at many auto part stores;
    - Do not erase as data is lost (freeze frame) that may help diagnose.
    Knowing all codes and other issues may help.

    P0404 -EGR POSITION SENSOR RATIONALITY (open)
    This is a rationality conflict with pintel position, the PCM does not like the info it is getting.
    This could be wiring or a EGR valve itself. In shop we would command EGR and observe the other sensors to confirm EGR opened or not.

    You could get ALL the codes FREE and post here.
    Cleaning EGR is an option, BUT if it removed replacement is cost vs time to clean, and probability cleaning is fix.
     
    Awrench, Jun 20, 2019
    #2
  3. Jun 20, 2019 at 7:15 AM
    #3
    aggrex

    #3
    aggrex Well-Known Member

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    DE
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    Tuffy>AEV>TTO>JW>STech>EVOcage>MagnaFlow>SpiderTrax>RockHard>TF>SpringTail>67design>Bolt>GPCA>Curt>
    With replacement EGR still generating same code inspect wiring and clean connections
     
    aggrex, Jun 20, 2019
    #3
  4. Jun 20, 2019 at 7:34 AM
    #4
    Awrench

    #4
    Awrench Well-Known Member

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    Aggrev- is right WIRING is suspect -
    Damn I did not process the "replaced" EGR comment in OP -
    we all know what this weeks issue is with me ;)
     
    Awrench, Jun 20, 2019
    #4
    aggrex likes this.
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