question about missing code

I have change my car engine , Kia carvival , model 2002 , diesel, body and chasi-sis number is ( KNAMA 75432 s 376008 ) but i could not switch on the new engine , because of the missing code and the electronic system , so please if any one can help me to solve this problem , I will be pretiat , if he contac me at my e-mail : MHD_YHY@yahoo.com .
Thank for all of you .