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Evap Codes P0442 P0454 P0456

FiestaSTdude

FiestaSTdude

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So have a check engine light on right now and I’m pretty sure it’s because of these Evap codes. (P0442, P0454, P0456). I replaced the purge valve 10k miles ago so I don’t think it’s that, but I’m not sure where to start trying to diagnose these codes. I’m pretty sure the first one to appear is the P0442 code, which the internet is saying could be caused by a bunch of different Evap related things. How can I test this system to determine what it is? Have any of y’all dealt with this issue?
PS, Evap is annoying and I wish I could eliminate it 😡
 


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