How often should the catalytic converter system of a sedan be cleaned?

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The catalytic converter system of a sedan is recommended to be cleaned every 20,000-30,000 kilometers or once a year using a non-dismantling cleaning method. Catalytic Converter Cleaner: Catalytic converter cleaner can simultaneously clean the engine's intake system, combustion system, and exhaust system. It effectively, quickly, and efficiently removes carbon deposits in the intake tract and combustion chamber, as well as chemical complexes attached to the oxygen sensor and catalytic converter. Precautions: Cars equipped with catalytic converters should not use leaded gasoline. When leaded gasoline burns, lead particles are expelled with the exhaust gases and pass through the catalytic converter, covering the surface of the catalyst. This reduces the effective area of the catalyst, significantly decreasing the conversion efficiency of the converter and leading to lead poisoning of the catalytic converter.