Anyone ever see this code before. Check engine light came on while I was doing daily driving today. Pulled off to the side of the road and turned truck off and then back on but light still remained. Drove to the nearest Autozone and they pulled a P0253 code which pointed to the VP44 injection pump. I then started the truck again in the parking lot and it went away. Drove about 100 miles more and had no light?? I have a fuel gauge, mechanical, and it never drops below 12 psi. Truck shows no other signs of there being something terribly wrong with it. Just wondering if this is something to worry about