P0446 Diagnosis Simplified Expert Techniques for Beginners and Pros Alike

Claim your FREE engine code eraser https://free.nonda.co ============================= nonda Auto DIY Center is the biggest auto DIY ... DTC P0446 Evaporative Emission Vent System Performance How to fix P0446 EVAP Vent system performance code on a GM or Chevy truck. I was popping a 446 after every 120-150 miles or so. Now at 300 and no codes so still with fingers crossed. I also wanted to add my mpg went up from 16 to the ... Well-Known Member. Established Member. Joined: Mar 11, 2007. Messages: 7,580. Location: poteet,texas. po446 start HX65 2003 PCED OBD SECTION 5 ... when I had it scanned the code PO446 came up "Evaporative Emmission Control System Vent Control Circuit" I was told by a friend it is a typical ... I keep getting code po 446 on my 2003 Silverado. I have read that it could be the vent control valve. Any ideas? P0446 is a "vent control circuit malfunction" so the problem should be located somewhere in the vent valve or its wiring. If it were a leak it would be P0442. It could be the canister vent valve sticking, it could be a line leaking or it could be the canister itself. Disclaimer: Under no circumstances will proclaimliberty2000 be responsible or liable in any way for any content, including but not limited ... This diagnostic trouble code (DTC) is a generic OBD-II powertrain code. It is considered generic because it applies to all makes and models of vehicles (1996- ...