"no terminal 30" fault code 9e41
 

I'm trying to figure out why my PDC system is out. All the sensors look fine and still are clicking when I put my ear to them. I have the following codes:

PDC 9e28 which I believe is an internal fault of the PDC module

I also have a szl 9e41 which means (not terminal 30). Any clue what that is and what I should check? Before I buy a new PDC module, I want to make sure another system failure isn't causing the PDC to fail.