I've gotten all 3 of these codes previously when my CEL light came on, PO440/441/446....but after checking my gas cap, I just cleared the codes.....that is until this time when the light came on again and I started smelling heavy gas fumes.

Aside from the gas cap, does anyone know what this could be that would also cause a heavy gas fume smell?

any info. is greatly appreciated,

Thanks in advance

 

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