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P0456 Hyundai - is this very serious?

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please tell me or estimate about how long i will be able to drive before i get a new vehicle?
Vehicle: 2003 Hyundai Elantra

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Hi there,

You can continue to drive the car as ling as you like.

There will likely be no noticeable symptoms other than the Malfunction Indicator Lamp (MIL). This is because the EVAP system is a closed system and only controls fuel tank vapors, not engine management. 

 

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