My engine light keeps coming on so I finally pulled a code from my car that read "10 PCM P1431H". I was told that this was a problem with the fuel pump pumping between two areas of the fuel tank. This was news to me. Also, after about 45 minutes of continuous driving, my fuel gage goes to empty with actual level above empty. Has anyone ever had these two problems? Are they related? If so, what needs to be replaced. I am thinking the whole sending unit is bad. Any help would be great.