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The PO442 code indicates a small leak in the evaporative emission control system (EVAP) on your 2004 Lexus RX330. Start by inspecting the gas cap for any cracks or improper sealing, as a loose or damaged cap is a common culprit. Check the EVAP hoses and lines for any signs of wear or leaks, and ensure the EVAP canister is intact. If these components are fine, you may need to perform a smoke test to identify any hidden leaks in the EVAP system.

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3w ago

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