2018 LT Automatic - ABS/Trans Fault Codes

Discussion in 'International Forum' started by tim4280, May 20, 2019.

  1. tim4280

    tim4280 Bobtail Member

    12
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    Jun 22, 2018
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    66A1AEAF-0922-4B13-96DD-82B9004320A2.jpeg EBCB41FF-7A6B-48CA-8BF0-EB795F7B15E0.jpeg 3096112D-1F5B-4080-9A9E-417BE3428CC4.jpeg Hello, I drive a 2018 International LT Automatic. There seems to be a strange computer or electrical issue with this thing. An indicator light comes on saying Check ABS, then check transmission, then traction control comes on. It’s been in the shop in three states and they can’t figure it out. The codes it throws are as follows:
    S.A. 3 SPN 563 FMI 14 OC 127
    S.A. 11 SPn 639 fmi 2 Oc 127
    S.A. 33 SPn 597 fmi 0 oc 12

    It’s intermittent and seems like letting off the brakes can trigger it when it’s acting up. If I leave the truck run a while sitting still it goes away most of the time. Very strange issue. My cousin is a diesel mechanic and said one of the codes references the trucks network so it could be the way the obc was installed? Any help would be appreciated and if you need more info just ask and I’ll find it.
     
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  3. tim4280

    tim4280 Bobtail Member

    12
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    Jun 22, 2018
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    Also... while sitting still if I press the brakes it can trigger the errors. Then they go away after a while of sitting. It happens a few seconds upon removing my foot from the brake pedal.
     
  4. Heavyd

    Heavyd Road Train Member

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    Feb 4, 2009
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    You likely need a new brake switch. The brake switch is a smart switch and the body controller tells the trans and abs when you are braking. SA 3 is the trans, and SA 11 is the abs and those codes are specifically for communication problems only related to the hill start aid which is used when the trans it at an angle and thinks you are on an incline and uses the abs to help with holding your position and starting from neutral. The abs is also showing a code for not getting the right message at the right time and I believe this is because SA 33, which is body controller, is not sending the brake switch message because it is logging a faulty switch code.
     
    Ssgtkevin, BCS1474, 2013Maxx and 2 others Thank this.
  5. Aleks_Andar

    Aleks_Andar Bobtail Member

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    Sep 11, 2015
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    That’s very good explanation man, I kind of dealing with same situation. By brake switch witch one you mean? Brake light switch or… how to ask at the parts desk? Thank you!
     
  6. Heavyd

    Heavyd Road Train Member

    7,635
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    Feb 4, 2009
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    Yes, the brake light switch that is mounted in behind the instrument cluster.
     
  7. 2013Maxx

    2013Maxx Light Load Member

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    Jan 17, 2018
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    Is it behind the cluster on a 2013 ProStar also?
     
  8. Heavyd

    Heavyd Road Train Member

    7,635
    6,040
    Feb 4, 2009
    0
    Yes it is, same part number.
     
    2013Maxx Thanks this.
  9. 94coupe

    94coupe Light Load Member

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    Nov 7, 2017
    North Carolina
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    The codes I have are
    Sa 160 spn 523 fmi 9
    Spn 84 fmi 9
    Sa 11 spn 639 fmi 3

    Mines fine but if I stop driving and turn truck up it acts all funny and cides pop up won't start check and and check ccm message comes on dash
     
  10. C-Youngblood

    C-Youngblood Bobtail Member

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    Apr 20, 2023
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    2020 International LT
    Codes SA 11 SPN 1808 FMI 2 OC 1
    TC LIGHT AND ABS LIGHT
    (car with wet lines behind it)
    CHECK ACC/CMS SYSTEM ON
    CHECK ABS MESSAGE
     
  11. 94coupe

    94coupe Light Load Member

    236
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    Nov 7, 2017
    North Carolina
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    my truck randomly has those codes when its rainning heavy
     
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