[Algold415]

Originally Posted by e90Noobie

This may not have anything to do with your problem but thought i'd post it just in case.

https://www.tunemyeuro.com/low-rail-...ry-controlled/

Thanks! This is definitely for the 4560 & 4570 codes which is usually the opposite of my issue, it's for 'Fuel Pressure Too Low'. I think that happens when either the LPFP doesn't send enough fuel to the HPFP. Or if the HPFP is faulty (crack in housing, etc) and doesn't fill the Fuel Rail.

Appreciate the suggestion though!