Under what circumstances should the three-way catalytic converter be cleaned?

[OFelix]

Cleaning the three-way catalytic converter is necessary under the following circumstances: 1. Long-term use of engine oil containing sulfur and phosphorus antioxidants; 2. Frequent driving in congested traffic conditions; 3. Engine carbon buildup. The cleaning methods for the three-way catalytic converter are: 1. Add specialized three-way catalytic cleaner to the fuel tank; 2. Connect a hose to the engine vacuum pipe, utilizing the negative pressure in the hollow pipe to draw the cleaner from the hanging bottle into the engine. The working principle of the three-way catalytic converter is that when high-temperature exhaust gases pass through the purification device, the catalyst in the three-way catalytic converter enhances the activity of CO, HC, and NOx gases, facilitating oxidation-reduction chemical reactions that convert them into harmless gases.