How to Solve Xhorse VVDI2 BMW BDC OBD SWFL Lost

 Problem:

I was trying to add a new spare key to Bmw x1 2019 BDC with xhorse vvdi2 via OBD.

Now BDC has no communication, error SWFL Lost. Any solution?

Possible reason:

Failed to make sure proper voltage.

Solution:

Now you need to restore flash. You need to bench read flash and repair then write back to BDC.

Try to unlock on bench. Power supply stable at 13.5v. Try several times until flash writes ok.

Feedback:
Solved.  Flash with esys and removed bdc job on bench and done!