After EGR exchange

Hello friends, good holidays to everyone .. My 2005 model 407 SW 2.0 petrol car had a P0400 EGR malfunction. I bought my new EGR and changed it. However, the malfunction code still appears. I heard that the new egr needs to be adapted after the Egr change. Does anyone know about this. Thank you from now.

When I had an egr change, they connected it to the computer and made a definition.