P0456: Evaporative Emissions System - Small Leak Detected - AutoZone
https://www.autozone.com/diy/diagnostic-trouble-codes/p0456-evaporative-emissions-system-small-leak-detected
WEBWhat Causes P0456? Your evaporative emissions system includes your fuel tank, fuel lines, hoses, a filter canister, and a purge valve. Any of these components could have a minor leak, so here is a complete list of areas you need to inspect to identify the cause: Loose or cracked gas cap. Small leak in your fuel tank.
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