Issue:
Vehicle: Citroen Bosch MD1CS003 (2020 year)
Symptom: Block writing stops at 87% using KT200 II ECU Programmer
Reading: Successful

Images:
Image 1: MD1CS003 ECU outlook


Image 2: Block write at 87%


Experienced Users’Answers:
1.This ecu got a upgrade from the mother house and now has a new protection that doesn't allow you to type anymore, I've had a ton with the same problem.on some laws without problems (you were one of them).
2.I've done so many .. the last one. last week, try to write the ori file
3.037 is a no go... As far as I know, no tool can do it for now.
4.Bad moded file.

Conclusion:
Please verify which of these points aligns with your current situation to write Bosch MD1CS003 2020 year with KT200 II ECU Programmer.