First, you'll need to GENTLY remove the thin "frame" that goes around the door handle. Trust me, I "cracked" the little guy on both sides of my altima when changing my speakers. Use a little...
po441 is incorrect purge flow po446 is vsv vapor pressure sensor Before you do anything examine the gasket at the gas cap. Clean it with light oil. Tighten gas cap until you hear at least 3 clicks....