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To fix the P0449 code on a Hyundai Santa Fe, start by inspecting the EVAP (evaporative emission control) system components, particularly the vent control valve and associated wiring for any signs of damage or corrosion. Ensure that all hoses are connected securely and free of cracks or leaks. If you find any faulty components, replace them, and clear the code using an OBD-II scanner. If the issue persists, consider consulting a professional mechanic for further diagnosis.

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