My 2003 Honda Civic has Code P1456. Why no check engine light in winter months?

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As soon as the temps get warm and the humidity rises my check engine light comes on. The code is p 1456. It's not the gas cap. When fall comes around and the weather cools the light goes off. With this being said, can the culprit be narrowed down a little better? Thanks Robert

Rob P in Lilburn GA

Aug 16, 2015

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What are the best Honda repair shops?

RepairPal Certified shops can diagnose and repair your 2003 Honda Civic. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.

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My 2003 Honda Civic has Code P1456. Why no check engine light in winter months?

What is your question?

Rob P in Lilburn GA

Aug 16, 2015

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pushrodon Aug 16, 2015

Changes in ambient temperature from cool to hot increases fuel tank pressure and demand on EVAP system sealing... Suggest smoke test to find possible leak in EVAP system.

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Popular Answer

What are the best Honda repair shops?

RepairPal Certified shops can diagnose and repair your 2003 Honda Civic. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.