HPFP reads 0v

After a random u2064 code popped up a while back I decided to start looking through different monitors on my ap and noticed that I had 0 voltage to the hpfp sensor. The code went away on its own and has since not come back. However, sometimes on cold starts after a few seconds when the rpms have dropped to around 1200-1500 it will rev back up to 2k for a second then drop back down where it was before. I haven’t had any pressure issues and the car runs normal other than intermittent cold start behavior. I thought maybe a bad ground or frayed wire could be a good place to start but I haven’t found anything that stands out. Any insight would be appreciated!

 

My AP has always showed 0 voltage for HPFP, I think it is a bug in software.

 

I had a considered that but have also seen threads where people claim that they get anywhere from 1v-5v so I assumed something was up. If it is normal then I’m back to wondering what the u2064 code is