Yo, I dont know how true this is but I was told if you use the p28 on the d15 motor that you have to use the IM off of the z6 so it wouldn't throw a code. But I dont know how true that is. But if anyone could brake that down for me a see if that is true cause I'm doing a d15 swap in my wifes car. And I want to be sure that when I swap the motor and trans that I dont fall into any problems.