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Dodge Caravan engine light p0455 p0442

The other day my check engine light came on with codes p0445 large vacuum leak and p0442 small vacuum leak. The gas cap is on tight before anyone asks. My understanding is these are popular codes for the Caravan's and Town and Country's I do not hear any hissing from a vacuum leak. Any ideas where I should look next or has any one had the same experience.

2002 Grand Caravan 3.8 liter, 92K miles front wheel drive. One bad transmission, one power window that almost works, power hatch and power slider that don't work. one power steering fire, running on its third left axle, should have bought a Honda


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