Possible causes – EVAP purge solenoid vacuum supply– EVAP purge hose/tube obstruction– EVAP purge solenoid vacuum supply-evap system leak– Faulty Powertrain Control Module (PCM) Tech description The P0441 code means that the control module has detected a leak in the Evaporative Emission (EVAP). Loose fuel tank filler cap is the most common cause that triggers…