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montrose818 · 08-27-2025, **(Subject: derate 3712, 3714, 2976 )**

Hello, 2015 ISL9 here.

Changed out my NOX and doser unit (genuine cummin) to get rid of some codes and it did, but left with these three now. Ran a regen, completed, codes still there. Ran an SCR test, eventually truck shuts off, Aftertreatment Warm Up an DEF dosing test says stopped, check status window, but status window just says Running.

Ive been reading and some suggest updating the ECU, or maybe the doser pump for the 2976 code.

Flashing this truck is unfortunately not an option, as it needs to be passing the biannual CA smog check.

Thanks for your help.

tree98 · 08-27-2025, **(Subject: derate 3712, 3714, 2976 )**

Yea update the ECM, if it has the original program in it from 2015 it's very outdated and the newest file could have fixes for some of those codes you mentioned.

Rawze · 08-28-2025, **(Subject: derate 3712, 3714, 2976 )**

... and while you are at it, do a full EGR tune-up on it as well...
http://rawze.com/forums/showthread.php?t...30#pid7030

montrose818

Thanks

question

In quickserve and my ESN, under Service, Related Information, I dont see Calibration Downloads.

---Service Applications
Agility Fuel Systems – Parts and Service Information
External LinkCummins Clean Fuel Technologies
SPN/FMI To Cummins Fault Code Cross-Reference
---Service Documents
Archived Service Parts Topics
Regulatory Documents

these are my only options. Do I need a paid account? I am only using one ESN out of 5 slots.

Thanks!

tree98

You need a paid account to get them that way. You can get them for free here...

https://www.cummins.com/support/digital-...al-support

What program do you have right now?

montrose818

Thanks! I am using Cummins Insite.

I see 13 disks available for download, is this correct? Will I be able to see which cal applies to my engine?

Rawze

(Yesterday )montrose818 Wrote: Thanks! I am using Cummins Insite.

I see 13 disks available for download, is this correct? Will I be able to see which cal applies to my engine?

Yes, 13+ disks. Its Unknown as to which one has your specific calibration on it, so you might have to download them all to find it.