Scr system altered code on 2016 T680

Discussion in 'Ask An Owner Operator' started by Adriantx, Nov 24, 2021.

  1. Adriantx

    Adriantx Light Load Member

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    Dec 29, 2018
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    So I have a t680 2016 cummins isx truck was off for 3 days when I turned it on I got the SCR system altered or fault detected as well as the engine derate code I did a rest and engien derate code never came back on took it to dealer and guy said all the scr codes popped up at the same time and all were referring to low voltage problem said I maybe change the batteries that maybe they got a lil to low and caused this I am just wondering if this is possible can bad batteries cause this sort of issue. On his computer it was not registering any fault sensors just tha all the codes were referring to low voltage issue. batteries are about a 1yr and half. Let me add def gage was normal no red light blinking and I always keep tank over half never hits empty or gose below the half.
     
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  3. ProfessionalNoticer

    ProfessionalNoticer Road Train Member

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    Apr 25, 2021
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    Take your batteries to an auto parts store and have them load tested individually.
     
  4. NYStarcar

    NYStarcar Light Load Member

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    Oct 6, 2020
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    Any time you have low system voltage on the ISX it will set those codes when started. Have the batteries checked
     
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