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The check engine light on a 2006 Toyota Avalon can illuminate for various reasons, including issues with the engine, transmission, emissions system, or sensors. Common causes include a loose or damaged gas cap, faulty oxygen sensors, or issues with the catalytic converter. To determine the exact cause, it's best to use an OBD-II scanner to retrieve the diagnostic trouble codes, which can guide necessary repairs. Ignoring the light can lead to more significant problems down the line.

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AnswerBot

3w ago

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