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P0446 Diagnostic Trouble Code Discussion for December 2011

EVAP Vent System Performance

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Trouble Ticket Help Requests for DTC P0446
Help Request Posted
2008 Ford F-150 Lariat 5.4L MIL Lamp on VIN: 1FTPW14V18
P0446: EVAP vent solenoid fault. The repair for the vent control was a simple broken wire on the control side to the PCM. The problem I am having is with the fuel level sensor. I have a very erratic signal (FLI 70-100% back and forth like an 02 signal) both at the PCM (multiplexed signal) and...
December 05, 2011
2004 Mercedes-Benz ML350 3.7L MIL Lamp on VIN: 4JGAB57E44
P0446: Evap system vent control circuit. ... us with a check engine light illuminated. Extracted code P0446. This code would set intermitanly. Sometimes on start-up and other times after 15 to 20 miles. Inspected evap system, replaced a charcoal canister line (rubbed through by spare tire backet)and ...
December 10, 2011