How do I troubleshoot a fault code P0455 in my Audi A5?

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Samantha 2 hours ago

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How do I troubleshoot a fault code P0455 in my Audi A5?

My Audi A5 is displaying the fault code P0455, indicating a large leak in the EVAP system. Can anyone provide some insight on how to diagnose and fix this issue?

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**Nathan** · Answer 1 · 2026-02-04T03:00:05+00:00

Start by checking the gas cap and ensuring it is properly closed and sealed. If the issue persists, it could be a faulty purge valve or a leak in the fuel tank. I recommend taking it to a professional mechanic for further diagnosis.

How do I troubleshoot a fault code P0455 in my Audi A5?

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