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Thread: Injector Calibration Codes

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    DANG IT'S COLD! AK Bob's Avatar

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    Injector Calibration Codes

    Lots of folks are replacing injectors, some for more fuel and others simply replacing the worn-out originals.

    My question is, must the calibration codes on the new injectors be entered into the ECM, or can the truck run just fine without?

    I have both Autoenginuity and AlfaOB but have not been able to find any options to write the codes to the ECM.

    Are you folks installing the new injectors and then having the dealership enter the calibration codes or simply not doing it?

    Just curious, maybe this information will help others who are thinking about replacing their injectors.


    2014 RAM 3500 (Aisin) 3.73 4X4 Limited Crew Cab Long Bed DRW. Oil Bypass Filter, Fuel Filtration Kit, and 50 Gallon auxiliary fuel tank.

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    2014 RAM 3500 (Aisin) 3.73 4X4 Limited Crew Cab Long Bed DRW. MM3 Tuned by Double R Diesel. Oil Bypass Filter, Fuel Filtration Kit, and 50 Gallon Aux Fuel Tank.

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    ********* watersupply189's Avatar

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    Re: Injector Calibration Codes

    Curious myself.


    2016 Ram Laramie 3500, G56, 6.7, CC, 4x4

    2016 RAM 3500 4x4 Laramie Crew Cab
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    Chrisn162001's Avatar

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    Re: Injector Calibration Codes

    It’s only early 6.7s that have calibration codes.

    I think 12 and below don’t quote me on that though I’m unsure about the years.

    With quality aftermarket injectors, it’s not so much of an issue. Most are matched within 2% of each other.

    I think it was Dynomite diesel performance who tested multiple sets of OEM factory injectors and found variations across groups up to 10%.


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    DANG IT'S COLD! AK Bob's Avatar

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    Re: Injector Calibration Codes

    Quote Originally Posted by Chrisn162001 View Post
    It’s only early 6.7s that have calibration codes.

    I think 12 and below don’t quote me on that though I’m unsure about the years.

    With quality aftermarket injectors, it’s not so much of an issue. Most are matched within 2% of each other.

    I think it was Dynomite diesel performance who tested multiple sets of OEM factory injectors and found variations across groups up to 10%.

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    Thanks for sharing your knowledge, very much appreciated.

    After reading your reply, I went back into AlfaOBD and checked earlier model years, and you are correct.

    From 2012 back, they provided an option called “Injector Quality Adjustment” that allows for injector calibration code entry.

    So I am assuming that if you are replacing injectors on anything older than 2013, you would probably want to enter the corrected codes because the codes already in the ECM could throw things off, correct?


    2014 RAM 3500 (Aisin) 3.73 4X4 Limited Crew Cab Long Bed DRW. Oil Bypass Filter, Fuel Filtration Kit and 50 Gallon auxiliary fuel tank.

    Sent from my iPad using Tapatalk

    2014 RAM 3500 (Aisin) 3.73 4X4 Limited Crew Cab Long Bed DRW. MM3 Tuned by Double R Diesel. Oil Bypass Filter, Fuel Filtration Kit, and 50 Gallon Aux Fuel Tank.

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  9. Top Of Page | #5
    Chrisn162001's Avatar

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    Re: Injector Calibration Codes

    Quote Originally Posted by AK Bob View Post
    It’s only early 6.7s that have calibration codes.

    I think 12 and below don’t quote me on that though I’m unsure about the years.

    With quality aftermarket injectors, it’s not so much of an issue. Most are matched within 2% of each other.

    I think it was Dynomite diesel performance who tested multiple sets of OEM factory injectors and found variations across groups up to 10%.


    2014 RAM 3500 (Aisin) 3.73 4X4 Limited Crew Cab Long Bed DRW. Oil Bypass Filter, Fuel Filtration Kit and 50 Gallon auxiliary fuel tank.

    Sent from my iPad using Tapatalk
    If the factory injectors are being replaced with stock injectors, then yes, they should be programmed.

    Now when swapping to aftermarket bigger injectors, I never have entered the code.

    I never had any issues either.


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