110D4- Failure to Write Data to Vehicle from Bully Dog BDX Tuner

    November 5th, 2021

    This error code means, "Failure To Write Data To Vehicle"

    Things to try/Check for:

    Reload custom tunes to the device
    This can be caused by masked strategy protection on eco boost vehicles from 2011 to 2017- In this case **do not call your dealer, instead, reach out to our Support Team via phone, chat, or email. We can assist.**

    In many cases, this issue can be resolved by loading a Stock Custom tune to the vehicle.  A stock custom tune is just your vehicle's stock tune made into a custom tune with no changes.  Once that is complete you will be able to tune as normal without this error.

    To get a Stock Custom tune without having to call in, wait on hold, etc. email the information below to faqhelp@derivesystems.com.  Put "Stock Custom" in the subject line.

    Required Vehicle Information:

    1. Year:
    2. Make:
    3. Model:
    4. VIN:
    5. ECU Strategy:
    6. ECU SWPN:
    7. .BEF file attached to the email

    Click here for the steps to get the required Vehicle Information.

    1. Plug your device into the OBDII port on your vehicle.
    2. Select "Vehicle Info" from the main menu.

         3. Select "Continue".

    4. After selecting continue it will show you the VIN number the device read, along with the strategy and part numbers associated with that vehicle.


    Click here for the steps to get the .BEF file needed

    How to get a .bef file

    1. Plug the device into the computer and open up the Device Updater.
    2. On the device updater, select the bottom option “Get Stock File from Device”.


          3.  On the Device Updater, you will then select “browse” and select where you want to save the file. You can either save it directly to the desktop, or to a new folder.


          4.  After the file is saved, you will find it in the location you selected.  The file will be saved as your serial number.bef. For example XXXXXXXXXXXXX.bef


    Click here for steps to load a Stock Custom tune to your device

    How to load a stock custom tune file

    To load a Stock Custom Tune to your device:

    1. Open up the device updater, and select “load custom tune file”.

           2.  On the next page select “browse” to locate the custom tune, then select the custom tune that you have been emailed. Go to wherever you saved it from the email whether on your desktop or a folder on your PC.

          3.  On the device updater you will need to highlight the stock custom tune on the left side under available tunes, then select “>>" to Add to Device.


          4.  Once the custom tune shows up under “on device” on the right, select “Program” below.

          5.  It can take a few minutes to load the custom tune to the device, you will see a progress bar at the bottom of the device updater, and you will see a message saying “Custom Tune Programming Complete”.


          6. At this point, the Stock Custom tune is loaded to the device. You are now ready to go to the vehicle, select “Program Vehicle” from the main menu. Follow the prompts on the screen and select “custom tunes” from there you will be able to select the “stock” custom tune to install.
     7. After you have installed the stock custom to your vehicle, you should be able to go back into "Program Vehicle" and tune as normal.


    Note:  Emails received outside our normal business hours will be replied to on the next business day.

    Was this article helpful?

    Can’t find what you’re looking for?

    Our Technical Support team is here for you.

    Contact Support