Possible causes – Faulty Evaporative Emission (EVAP) Purge Solenoid Control– Evaporative Emission (EVAP) Purge Solenoid Control harness is open or shorted– Evaporative Emission (EVAP) Purge Solenoid Control circuit poor electrical connection Tech description On some Subaru model replacing the PCV valve takes care of the P0458. If the problem persist the Engine Control Module (ECM)…