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Message: <blockquote data-quote="PoManNox" data-source="post: 29945" data-attributes="member: 8300"><p>It would help to know what the exact trouble code(s) were.   Regardless, the icing up of active grille shutters can be a problem with any make/model today.   As painful as it is, I don't wash my vehicles in the cold of winter anymore.  IMO, it pushes corrosive liquids where corrosive liquids ought not be.   I am a big proponent of treating my vehicles with oil, wax, or lanolin based rust proofing though.  I do my own treatments with fluid film and/or woolwax in the warm months.  I let my vehicles be all winter.  If I do wash them on a sunny "warm" winter day, they'll be salty and dirty by the time I get home anyway.</p></blockquote><p></p>