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P0456 error


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Hello folks! 

I started getting the P0456 error a couple of months ago on a 2019 Edge SEL. I see a post from 2017 about the vacuum purge valve, so I'm considering replacing that if I can find the correct part number. I've also seen reference to the gas tank fill flap (capless) getting dirty and staying open a little so I'll check that too.


What I've noticed is that after I fill up, when I try to start the car immediately after filling it usually takes two tries for the engine to get going. I'm wondering if this symptom is pointing to one over the other or something else entirely?


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