Fault code

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by bthompkins81, Oct 23, 2019.

  1. bthompkins81

    bthompkins81 Bobtail Member

    2
    2
    Oct 23, 2019
    0
    I have a 17 Freightliner Cascadia and just got a fault code spn 3223 fmi 7. Does anyone know what this is?
     
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  3. Mike250rs

    Mike250rs Heavy Load Member

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    7,079
    Sep 24, 2019
    Raleigh, NC
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    Raw Nox sensor
     

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  4. PE_T

    PE_T Road Train Member

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  5. Detriotpowerdd13

    Detriotpowerdd13 Bobtail Member

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    1
    Dec 20, 2019
    0
    Hey having same issue how did you fix it what was it thank you
     
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  6. Biloxicoast2010

    Biloxicoast2010 Bobtail Member

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    Apr 12, 2018
    0
    Figure your out?
     
  7. bthompkins81

    bthompkins81 Bobtail Member

    2
    2
    Oct 23, 2019
    0
    Had to replace Inlet Nox sensor and then the outlet Nox sensor a week later
     
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