A system and method cleans a fuel pump pressure control function valve having (i) an orifice linking a first region (e.g., a high pressure region) and a second region (e.g., a low pressure region) and (ii) a closing member biased to close the orifice when fuel pressure in the first region is below a threshold pressure. Cleaning the valve may include increasing the pressure in the first region to an overpressure condition, thereby causing the closing member to be moved to open the orifice such that a rapid flow of fuel occurs from the first region to the second region. A pressure control function valve can therefore be conveniently cleaned without requiring engine disassembly or adding additional physical elements. The fuel pump pressure control function valve may be part of safety or check valve of a fuel pump.