Is the HPFP dying on my 2011 JSW?

I was driving home today when my vehicle bucked strangely (felt like a misfire) and then went into limp mode. I also noticed a high pitched clicking noise that began immediately afterwards. I took out my code scanner and it had a code for "low fuel rail pressure / fuel system pressure" on the ECU. I cleared the code and started the car back up. It is not in limp mode now and the code didn't immediately come back on, but there is definitely a high pitched clicking noise that was not there before that goes up with engine revs.

My guess is this only means one thing: dying HPFP. I am planning on taking it to the dealer tomorrow as it is still under the dieselgate warranty. Anyone else have an experience like this?