From what I have heard from those who have done this is you just turn off the codes. The l31 tune only uses the cam sensor to put the engine into sequential fuel injection mode. Without the cam sensor it will try both sets and go with the one it runs the best on. It doesn't use the cam sensor like it does in a 24x high res crank sensor system. And there is no parking brake signal wired into the 0411 in a l31 that I know of. I did my case learn without setting the parking brake. But you will need to either disable the nsbu switch, or hook up the 4 wires from the nsbu to the pcm. You're going to need quite the custom OS to make it work dual electric fans and everything correctly. Check on youtube as there is somebody on there who did one.