Originally Posted by Wedge1967
Yes, two very different things. Your LPFP feeds the HPFP and if it can't maintain the required pressure, your DME will trigger a LPFP code. Replacing the LPFP could increase the pressure and volume, but eventually you will exceed the volume required to supply the HPFP with a single pump.
Cars running the bigger in tank pump are getting a LPFP code and those running the booster pump are not? ign335i said using the single larger pump prevented the LPFP code too.