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p0404 The engine light on my 2007 Dodge grand caravan

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I need to know what the code P0404 means.

Vehicle: Dodge Grand Caravan 2007

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P0404 EGR position sensor performance

This is for the EGR flow or the valve position where it is not supposed to be at. If it is open at idle when it is not suppose to be it will cause lean misfires and rough idle.

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