Hello i have unlocked a pcr2. 1 ecu.. Mounted ecu in car and was going to read write obd with kess red eu.. Have done Skoda and golf with this ecu before.. but today it came warning message from kess.. Warning unknown ecu....... Xxxxx... But i could read file but what happends when i write file🙉 car is a passat 1.6tdi 105hp..have Google that if protocol is right fore ecu it writes fine🤷~♂️ any experts in here🤔 thanks🍾🎉