Code P1D03 on 2014 Mercedes cla250

What is your question?

Hello guys, my car is 2014 mercedes cla 250 P1D03 The vent valve for the crankcase has an electrical fault. There is an open circut I have been trying to fix my car I have changed the vent valve crankcase and ECU and most of the wire but still showing I looked all over the internet but no clue about this code

What makes this problem better or worse?

Not sure

How long has your 2014 Mercedes-Benz CLA250 had this problem?

I bought the car a year ago but I couldn’t register bc that code tried