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P0446 Diagnostic Trouble Code Discussion for November 2007

EVAP Vent System Performance

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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