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I have 2008 ford f 150 with trouble code p0446. I have replsced all 3 sensors please help

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I have 2008 ford f 150 with trouble code p0446 I have replaced all 3 emission sensors. please help

Vehicle: 2008 ford f 150

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HI there,

This code is for the vent control valve mounted on the charcoal canister. This usually won't be a sensor issue but the valve itself

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