How To Patch Your ECU

May 9, 2025by Joel Kumparak

     A full flash is required to apply our custom code patches like Map Switching, Torque Patch, Flex fuel, ETC. Some tools like Dead Beef Flash and Bflash can flash our code over OBD, while others like CMD and Autotuner can only flash our code with bench mode. Scroll down till you see your ECU, and then look for the flash tool you plan to use under the ECU section. If you don't see the tool you plan to use, contact us at Support@pmetuning.com.

 

VAG SIMOS 18.1 & 18.10

Bflash OBD

  1. Read the ECU.
  2. Open the .BDC in your editing software.
  3. Apply our patch to your stock .BDC.
  4. In your hex editor, go to the address 0x14000 in 8-bit hex and enter BFBFBFBF to perform a full write.
  5. Save the file.
  6. Export it.
  7. Write the file.

Bflash Boot mode

  1. Open the ECU and connect to the motherboard and ECU pins.
  2. Read the ECU.
  3. Open the .BDC in your editing software.
  4. Apply our patch to your boot read .BDC file.
  5. Save the file.
  6. Export it.
  7. Write the file.

VAG MG1

Bflash OBD

  1. Read the ECU.
  2. Open the .BDC in your editing software.
  3. Apply our patch to your stock .BDC.
  4. In your hex editor, go to the address 0x00000 in 8-bit hex and enter BFBFBFBF to perform a full write.
  5. Save the file.
  6. Export it.
  7. Write the file.

Bflash Bench mode

  1. Connect to the ECUs pins.
  2. Read the ECU.
  3. Open the .BDC in your editing software.
  4. Apply our patch to your bench read .BDC file.
  5. Save the file.
  6. Export it.
  7. Write the file.

CMD OBD - Not Possible 

CMD Bench

  1. Connect to the ECUs pins.
  2. Take a backup of the ECU (not with bench mode).
  3. Open the backup file in your editing software.
  4. Apply our patch to your bench read file.
  5. Save the file.
  6. Export it.
  7. Write the edited backup file
  8. Navigate to the bench option for your ECU.
  9. Read in Bench mode.
  10. Write all calibration changes in bench mode, NOT AS BACKUP.

Dead Beef Flash - DBF1 OBD

  1. Connect to the car with the DBF1 software
  2. Save the stock .BIN by clicking "Save Stock Binary" under the "Flash ECU" tab.
  3. Open the .BIN in your editing software.
  4. Apply our patch to your stock .BDC.
  5. Save the file.
  6. Export it.
  7. Uncheck "Fast Flash When Possible" under the "Flash ECU" Tab to perform a full write. 
  8. Flash your file by clicking "Custom"
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