× 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 November 2007

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
1999 Lexus RX300 3.0L MIL Lamp on VIN: JT6HF1OUOX
P0446: Evaporative system vent solenoid problem. ... part number (90910-12150), delete malfunction code P0446. MIL returns after second drive cycle w/same code P0446.
November 08, 2007
1999 Mercedes-Benz ML430 4.3L MIL Lamp on VIN: 4JGAB72EXX
P0446: activated charcoal canister shutoff valve. Hi, Car came with code 0446- activated canister valve. I did replaced the valve with new (smaller diameter and hose) from MB. Same code. Also replaced fuel pressure sensor(on the filler neck). No help. I get no voltage on the blue wire(should be 12V according ...
November 29, 2007
2001 Mercedes-Benz S500 Guard 5.0L no venting VIN: WDBNG75J81
P0446: activated charcoal shut off valve. customer reports when filling tank excessive pressure will shoot back when nozzle is removed - we removed the left rear fender liner and tested the vent valve y58-4 which we had previously replaced - this valve is open without electrical signal to allow air to...
November 30, 2007