I just bought one of these code readers, man im struggling with it, I had to have this kid that's living temporarily in my yard in his van help me get sorted but for the PSD it seems needed. I have the "PIDS" loaded mostly interested in ICP readings as I have a lope, changed out my EBPS thought it would solve it. but then noticed that the ICP has RTV on connector waiting for the ICP and pigtail to swap it out. Im still learning this new fangled thang, I so love my IDI!