How Often Should the Passat's Three-Way Catalytic Converter Be Cleaned?
1 Answers
Typically, vehicles with good driving habits can have the three-way catalytic converter cleaned every 10,000 to 20,000 kilometers. If you notice increased fuel consumption or reduced power, the three-way catalytic converter should also be inspected and cleaned as needed. How to Determine the Condition of the Three-Way Catalytic Converter: Visual Inspection. Check the exterior of the three-way catalytic converter for any damage or discoloration. If there are scratches, cracks, or other signs of damage, the converter may have been compromised. If there are noticeable gray spots in the center of the converter's protective cover, severe discoloration on the shell, or purple marks, the converter may have experienced overheating issues. Check the Engine's Exhaust. Place your hand near the exhaust pipe outlet to feel the exhaust flow and check for blockages or poor exhaust flow in the three-way catalytic converter. Another method is to open the air filter, remove the filter element, and observe if there is exhaust backflow during rapid acceleration, which indicates poor exhaust flow. To assess the condition of the TWC (Three-Way Catalyst), also check if the secondary air injection pump is functioning properly. Use an Infrared Thermometer. Compare the temperature difference between the inlet and outlet of the TWC using an infrared thermometer. If the temperature difference is less than 10°C, the TWC is likely damaged.
