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DD15 codes

Discussion in 'Freightliner Forum' started by Gear shift, Aug 26, 2019.

  1. Aug 26, 2019 #1
    Gear shift

    Gear shift Bobtail Member

    1
    0
    Aug 26, 2019
    0
    We just purchased a 2012 cascadia with a dd15. We're brand new to this whole def thing. Can anyone tell me what these codes mean.
    Spn 520702 fmi 4
    Spn 523531 fmi 31
    Spn 2567 fmi 0
    Spn 4335 fmi 1
    Your response is greatly appreciated
     
    Gear shift, Aug 26, 2019
    Gear shift, Aug 26, 2019
    #1
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  3. Aug 26, 2019 #2
    tnevin225

    tnevin225 Road Train Member

    1,166
    1,601
    Jan 1, 2014
    0
    You might want a look into getting code reader software, It's not that expensive and can be extremely informative.
     
    tnevin225, Aug 26, 2019
    tnevin225, Aug 26, 2019
    #2
  4. Aug 29, 2019 #3
    johnnyman1099

    johnnyman1099 Medium Load Member

    362
    415
    Mar 13, 2017
    0
    After purchasing the truck, How long did the truck run before these error codes comes on ?
     
    johnnyman1099, Aug 29, 2019
    johnnyman1099, Aug 29, 2019
    #3
  5. Sep 2, 2019 #4
    tallmon

    tallmon Medium Load Member

    657
    320
    Oct 22, 2014
    0

    520702 is a light, not sure which one, maybe in cab, maybe outside
    523531same as above. If all your lights are working then ignore these two.

    2567 is a cluster communication error. no big deal, check cluster harness in back of the cluster.

    4335 fmi 1 is the bad one
    Diesel Exhaust Fluid (DEF) Air Pressure Not Detected (From Vehicle Supply). 25% Derate.
    Could be DEF Metering unit, pressure sensor, pump

    See attached diags.
     

    Attached Files:

    tallmon, Sep 2, 2019
    tallmon, Sep 2, 2019
    #4
    m2Tim Thanks this.
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