I have 2 codes right now on my car that are showing up I have p0171 which I know is most likely a vacuum leak and I am getting code p0453. My question is what would cause p0453 I am out of town still and trying to make sure the car is say enough to drive 600 miles to get back home. Does p0453 have anything to do with the fuel pressure sensor? I only ask this because the one guy that broke my old one had to use one from the junk yard. And if so could this also be possibly causing the p0171 code as well?