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Egr temperature switch

what is the seqquenceof operation of the egr temperature switch?

In general EGR operation is inhibited when the engine is cold. I always wonder about these “poker face” posts. The OP clearly does not want to reveal his hand (the story).

Either that or the OP is in school and this is a test question.

I confess to using the net for reasearch also but not during a test.