Cummins Engine Compatibility


Check your ECM

The Simulator has only been tested and shown to work on a handful of Cummins engines using Cummins CM2350 ECMs. Before you begin building your own Simulator we recommend that you ascertain what model ECM you have. As a general guideline the Simulator should work on all Cummins engines designated as EPA 13 and/or EPA 17. We believe that includes all engines produced since 2013.

Even if your ECM is not a CM2350 but your engine was built by Cummins for on-road use in 2016 or later and it has the same 4-pin connector, there is a good chance that it will work, but this is YOUR DIY project so experiment at your own discretion.

We would recommend that if you do decide to continue, that you check your Simulator wiring very carefully for shorts, opens and proper connections. If everything checks out and you did not get any errors when you installed the Arduino firmware, then just put the Simulator away and forget it until and unless you have a real DEF sensor failure. Only then should you consider connecting the Simulator to the vehicle because at that point you have nothing to lose.

Check your wiring

Also before you start building anything we recommend you locate the connector between the OEM sensor on the DEF tank and the vehicle wiring harness and compare it to the photos below to ensure your coach is using the same style connector (click on the photos to expand):

47 Comments to Cummins Engine Compatibility

  1. James D Gorski says:

    Is this something I would need to do for my 2019 6.7 diesel with only 6000 miles on it with no issues yet.
    My Dynamax fw30 4×4
    Thank you

    • BRIAN WAYNE says:

      I have the FORD ’20 6.7L “Scorpion” engine and there are numerous companies offering DEF and DPF delete tuning. That would be a work around until parts become available. Then the owner can have their stock tune reinstalled. Also, there’s the option for the Operator Commanded Regeneration feature to be turned on allowing owners to burn off the particle filter periodically. Local law enforcement suggested that I could straight pipe and DEF/DPF delete my truck for off the road use. The officer reminded me that KY has no emissions compliance annual vehicle inspections.

      • Archer2 says:

        This is not a “delete” device in any way. It is just a temporary tool to allow an otherwise fully functional vehicle, including all emissions control systems, to continue safely until the failed OEM sensor can be replaced.
        We do not encourage, condone or approve of any attempt to disable the emissions control systems and will not tolerate any discussion of such activities on this website.

  2. Tina says:

    Thank You for helping us stay on the road.

  3. Tina says:

    How do I find out the model # of my ECM?

    Is the model number of ECM determined by my VIN# ?

    Thanks in advance.

  4. Richard Carter says:

    Is my 2016 2500HD Duramax affected by this?

    • Archer2 says:

      This project is focused on only Cummins HD engines using CM2350 ECMs. We would not have any idea what your pickup might need.

    • Todd Carlson says:

      All Diesel engines are affected by this if any part of the DEF system goes bad. My 2017 GMC 2500HD Denali 6.6 Duramax currently has a bad DEF Heater and they can’t get a new one due to the chip shortage so my truck is just sitting at the dealer.

      This is a much larger issue than just RV’s, Semi trucks are also being affected and being parked due to DEF issues they can’t get parts for to get them back on the road.

      The Manufacturer’s simply need the EPS to allow them to issue the software update to the Dealers so that all of these vehicles can have their ECM’s updated to not shut them down if something goes bad.

      • JWP says:

        Todd, Yes you are correct that this is affecting all Diesel engines with DEF systems. However this project is focused on Large Cummins engines using the CM2350 ECM. The med duty trucks such as yours have a different programing connection as well as different programing. I do know that the larger engines that are used in heavy first responders do have a software update that keeps them from a derate status due to emissions. However, live literally depend on those. The EPA and several engine manufacture are currently working on a software solution, I do not know if that includes med duty vehicles.

  5. Dave Kearney says:

    is this only good for Cummins engines as I have a F250 diesel that I had trouble with & finely had them replaced but it could happen again while we re pulling our 5th wheel

    • Voltdoc says:

      Sorry this won’t work for your vehicle. It has not been tested on the med duty engines and probably wont even hook up to them in this configuration. The connector and ECM programming may be OBD instead of J1939 and the DEF system is very likely to be different.

  6. Curtis says:

    I have a 2011 Fleetwood Discovery 42A with a Cummins 8.3 ISC in a Spartan chassis. It has the CM2250 ECM in it. Do you know if anyone has had luck with this working with that ECM? Thank you.

    • JWP says:

      Curtis, we have not tested against the CM2250 as of yet, so I can not say definitively that it will work for you. I believe your 2011 was either the first or second year of def engines, the sensor pack used at that time was in the early stages and only measured quantity and temperature of the def. Some of those sensors were analog as well. This solution was engineered primarily for 2016 and above ECM that use digital monitoring.

  7. Rebecca Burgman says:

    We have a 2016 Tiffin Bus 450. We are currently stuck on the road with zero power to engine. Amarillo, Tx. There is a Cummins dealer in town do you think they can help with this problem? We had all lights on our dash board lite up.

  8. Steve John Buckman says:

    Question I already have a Raspberry Pi with CAN bus interface. Will the software load onto it and work?

  9. Ray Morris says:

    I have a 2020 Newmar Dutch Star w/ ISL9 450 engine. It has the CM2350 controller. L9 CM2350 L116B. Freightliner chassis. But the plug is different on the DEF head.

  10. Bill Westman says:

    I also have a different type of plug. Can you help if I send a picture?

    • Voltdoc says:

      We can try. If there are any numbers on the connector see if you can capture them. Also make, model, year of equipment, engine manufacturer and ecm version if known. Brand of def tank assembly would be good to know as well.

  11. John DeRubba says:

    Mercedes is currently making changes to the emissions system. Is this related to the same issue?

    • Archer2 says:

      I am not an expert but what I have read is that the Mercedes issue has to do with their software being programmed to recognize when it was undergoing an emissions test and changing certain parameters to lower emissions during the test. That is just what I understand from reading about it. There may be more but it is definitely not a problem the DSS would have anything to do with.

  12. AZRVR17 says:

    Hello, I have a 21 London Aire. CM 2450 per cummings website. I have also confirmed it has a gen 7 DEF head. Has anyone built and tested with this CM. So if you believe the the tooth fairy I may not have a problem, but would like to have as a back up. Thank you. Also posted on IRV2.

    • Archer2 says:

      I don’t think anyone has tested the DSS on a CM2450 ECM. You could be the first. The worst it would probably do if it doesn’t work is throw the 3 usual codes which would clear themselves after reconnecting the OEM sensor and the internal diagnostics have run. If you try it let everybody know what you find.

  13. Jerry Pate says:

    I have a 2020 Tiffin RED 33AA with Cummins ISB 6.7 engine. I am not sure if it has a CM2350 ECM and is compatible with the DEF simulator. Could someone help me confirm this? I have already bought the parts. Hope it works. Thanks, Jerry

    • Archer2 says:

      Hi Jerry. Yes the DSS should work just fine on your Tiffin RED. The only variable that you should double check is that the connector between the OEM sensor and the Cummins wiring harness is the rectangular 4-pin Deutsch DT04 connector as shown in the build instructions (I’m pretty sure that it is).
      Good luck!

  14. Jerry Pate says:

    Never mind. I tried again to get into Cummins Quickserve and finally got in. It says that my ISB 6.7 engine has the CM2350 ECM. Guess I better get building my DEF Head simulator. Regards, Jerry

  15. Tissa Karunasiri says:

    I have a 2017 Tiffin Allegro Breeze 32BR. I am not sure about the ECM model. Any comments on the DSS compatibility?

  16. My Homepage says:

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  17. Harold Darrow Jr says:

    I have a 2017 Monaco Diplomat with the Cummins ISL9 450. The ECM is EB90154. Is this compatible with the DEF simulator.

    • Vic Chanko says:

      That looks more like the ECM Serial number not the model number but the info you really want is yes, you should have a CM2350 and it will work. But as always, check the connector on your particular Motorhome and verify for yourself through testing or some other way that you know which connector yours has and which wires go where. I don’t know what chassis a Monaco has, Freightliner?

  18. Jim Kimberlin says:

    I have a 2011 Allegro bus. We are dead in the water in Jonestown PA. Neither Cummins or Tiffin have given me any optimism about getting on the road again (1700 miles away from Houston.
    Reading through the posts it seems we are still at ground zero.
    We are 35 miles from Cummins and a dreaded tow would be $$$$$$.

    • Archer2 says:

      Can you provide some clue as to why you are broken down? Fault codes, SPNs, symptoms? Frankly,given the year your coach is, it’s not likely to be a candidate for the DSS. The troublesome DEF sensors started around 2016

  19. Roger Cochran says:

    I have 2016 Allegro Bus with a chassis built in 2015 (ISL 450 CM2350). I see 3 wires going into my DEF connector. Will this work on my coach? I do not have the DEF quality sensor on mine.

  20. RTC says:

    Good morning-Per the Cummins QuickServe website our 5.0LV8 ESN data states this engine uses ECM VERSION: CM3230A
    This engine is in a 2017 Tiffin Breeze 31BR motorhome.
    Is this ECM compatible with your design? Kindly Advise. Thank you.

  21. Douglas Darby says:

    I should have the final connector parts to finish the DSS for my Freightliner M2 106 2019 Renegade Verona LE 40LTS. I saw this in the article above “ Only then should you consider connecting the Simulator to the vehicle because at that point you have nothing to lose.”
    It seems to me it would be best to connect the finished DSS and then road test the vehicle to verify its functionality? Then if it road tests fine, unhook the DSS, reconnect the “not yet failed” DEF Header, and then store your verified fully functional DSS away for use when and if you get the dreaded failure. Is there some reason NOT to road test the completed DSS before storing it for future use?
    Thanks for the great work.

    • Archer2 says:

      Honestly Douglas, no, there really is nothing wrong with testing the device on your vehicle if you like. I would still urge you to first double check everything that you can on the bench using a meter to catch any errors that may be there. About the only thing that can go wrong outside of the things you can physically see and assuming that the firmware downloaded from your pc onto the board with no errors is the remote but still possible chance that the board itself is bad. I just got a new variant of board for testing from China and it had a bad USB port right out of the box, so it does happen
      Anyway, if you want to hook it up and give it a spin, please do. The worst that can happen is you get some faults and there are instructions on the site and in the comments on how to clear any fault codes up no problem.

      • Douglas Darby says:

        Thanks… Of course we plan on a thorough test and double check of the DSS components, etc, but will probably do a field test also for piece of mind. Hopefully next weekend or shortly there after.
        Thanks Again.

  22. James Utterback says:

    So glad that us in the equipment world are not the only ones with this problem. Thank you for all the time you guys spent in putting this together. I have 7 Skytrak brand forklifts with bad DEF heads and they are down.(5mph derate) (That’s 20% of my fleet !) These machines use a very similar DEF head and connector and use the CM2350 control unit although the are 4cylidner QSF engines. That should not matter right? Am I correct in thinking you are basically telling the CM2350 that the level, Temp, and Quality of def are correct so that it can complete the regen process as it normally would ? Very interested in trying this on some of these machines and getting them back up and running again and would like you opinion. Again thank you for all the time and energy that has been spent on this . Glad I am not the only one who hates to be held hostage by clay, copper, and solder !!!!

    • Archer2 says:

      Hi James, check your email for my thoughts. One thing I do need to stress is that the DSS just allows an otherwise fully functional vehicle that has a failed DEF sensor to be operated safely and normally until permanent repairs can be made. But EVEN WITH THE DSS IN PLACE you must still maintain a supply of quality DEF fluid and your emissions systems including the SCR (DEF) system. The DSS IS NOT A DELETE DEVICE IN ANY WAY. If you run out of DEF fluid the emissions controls will immediately go into a fault state and deration will be imposed. Actual damage to other components such as the DEF doser unit, pump and injector valve is a very real possibility.

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