Xhorse Key Tool Plus Failed to Write Audi BCM2 Dflash Pflash Error Solution

Problem:

Tried to add key 2014 Audi A4 BCM2 using Xhorse vvdi key tool plus and new Audi BCM2 solderless adapter. I read the BCM Lock 1 & 2 data, and I have the IMMO data. While writing back the data, a connection failed, and now, of course, the car won’t start. How can I write the data back?

Solution:
You must write back service file. If you have data1 and data2, calculate service file and write it back. Car will start again.

Here is the option to write service file.