Stalls at idle

So Im having some stalling at idle problems. When ot stalls it's thrown a P2188 CEL. I've changed my fp relay and the fp resistor and it made the cel go away but only for a few days, then it came back as did the stalling at idle. As I'm monitoring suff on my ap I noticed the the hpfp sensor voltage os reading 0volts and stayed that way they entire drive home.... What causes this and could this be the cause of my random stalling at idle. Also when is says hpfp sensor do they mean the fuel rail pressure sensor any and all help would be amazing. I also have a new in tank fp I'm putting it to see if that help cause I was told by someone on a fb group they had the same issue and replaced the relay, resistor box and in tank fp and that fixed it but just trying to cover all my bases

 

Don't put any more hard parts on it. You have a sensor issue