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Message: <blockquote data-quote="moose4now" data-source="post: 29939" data-attributes="member: 9067">I have a 2025 Equinox with the same problem.  When it is below freezing and I wash the car the check engine light comes on and what really pisses me off when the light is on you cannot use the remote start.  To find out what happens is water gets in the front air flow grille/dampener and freezes. Until that thaws out the light will stay on.  GM has not fix and the dealer just told me to deal with it.Twice I took the vehicle to the dealer with the light on. They let it thaw out and said all is good.  Seems like a design issue to me and it is also happening on other GM models.</blockquote>