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code P0456

Old Oct 15, 2021 | 02:03 PM
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Model: Cherokee (XJ)
Default code P0456

Hello.
The check engine light came on. The code reader shows #P0456 "Evaporative Emmision System Leak Detected" (very small leak).
Is this common?
2011 Laredo
Any ideas?

PS: It's not a loose gas cap as that has it's own code number.
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