× Auto Repair Pros Member Benefits TechHelp Knowledge Base Forums Resources My iATN Marketplace Chat Pricing About Us Join Industry Sponsors Video Members Only Repair Shops Auto Pro Careers Auto Pro Reviews
Join Now
International Automotive Technicians Network

P0446 Diagnostic Trouble Code Discussion for April 2011

EVAP Vent System Performance

Note: This is a professional automotive technician's resource.
Vehicle Owners: If you are seeking an automotive repair professional to service your vehicle, visit the iATN Repair Shop Finder.

Trouble Ticket Help Requests for DTC P0446
Help Request Posted
2004 Chevrolet Silverado 2500 HD 6.0L Misfire VIN: 1GCHK29U24
P0446: EVAP Vent System Performance. Hi guys. I have a 2004 Chevy Silverado 2500HD. Has misfires on all cylinders. Customer replaced plugs and wires with new sets, hoping to cure the problem. We have done a crank relearn, which did not help. We replaced the crankshaft sensor, still no change. We ...
April 21, 2011
2004 Saturn Ion-1 2.2L MIL Lamp on, inaccurate fuel gaug VIN: 1G8AJ54F94
P0446: EVAP Vent System Performance. Howdy, Need help here folks. i've spent alot of time on this saturn. I'll cut to the chase, Sets Po446 one day after clearing, alldata and OBD say po446 is a direct result of a vent circuit restriction in the Evap system, Ive replaced the vent valve and a faul...
April 30, 2011