P1447 INFINITI, NISSAN: EVAPORATIVE EMISSION CONTROL SYSTEM PURGE FLOW MONITOR
POST UPDATED IN June, 2023
P1447 INFINITI, NISSAN: EVAPORATIVE EMISSION CONTROL SYSTEM PURGE FLOW MONITOR
The Evaporative Emission Control System (EVAP) has a purge flow that occurs under unsealed throttle conditions. This purge volume is closely related to the inlet air volume.
Under normal purge conditions, i.e., when the throttle is not closed, the EVAP purge volume control solenoid opens and thus allows flow. This flow exposes the EVAP system pressure sensor to the intake manifold vacuum.
The OBDII diagnostic code P1447 is set on the Infiniti or Nissan vehicles, which means the Purge Flow Monitor has detected a fault. The EVAP Pressure Sensor output voltage has shown a pressure drop and flows out of proper levels.
The P1447 OBD2 fault code is set due to one of the following reasons:
Steps to troubleshoot the OBDII DTC P1447: