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P0446 Diagnostic Trouble Code Discussion for September 2012

EVAP Vent System Performance

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Trouble Ticket Help Requests for DTC P0446
Help Request Posted
2004 Mercedes-Benz CLK500 5.0L MIL Lamp on VIN: WDBTJ75JX4
P0446: Mercedes specific code 2012-activated charcoal canister shut off valve fault code. Head scratcher fellas???!!! this one comes in with this particular code set. We diagnose it as what we call a vent control valve (right rear of vehicle in wheel well).find valve operating properly when commanded open and shut with scan tool. What i was after i...
September 12, 2012