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What can be wrong when a P1456 check engine light on 2001 Honda Accord?

Possible causes:

* Faulty evaporative emissions (EVAP) purge control solenoid valve

* Faulty EVAP purge control solenoid valve circuit wiring

* Faulty fuel cap

* Faulty EVAP canister/purge valve assembly

* Vacuum leak in EVAP system