Is it necessary to replace a faulty three-way catalytic converter?

[LeGia]

If the three-way catalytic converter is faulty or damaged, it must be replaced; however, if it is merely clogged, replacement is not necessary. Below is a detailed introduction to the three-way catalytic converter: 1. Introduction to the three-way catalytic converter: The three-way catalytic converter is part of the automotive exhaust system and serves as a purification device. It is designed to clean harmful gases from vehicle exhaust, ensuring that the emissions released into the atmosphere do not pollute the environment. 2. Function of the three-way catalytic converter: The role of the three-way catalytic converter is to transform harmful gases emitted from the vehicle into harmless gases. The primary harmful gases in vehicle exhaust include carbon monoxide (CO), nitrogen oxides (NO), and hydrocarbons (HC). The three-way catalytic process involves using specific chemicals to trigger a series of chemical reactions with these harmful gases, converting them into harmless substances. Of course, if the three-way catalytic converter fails, this conversion function will be lost.

[LeEverett]

A faulty catalytic converter doesn't necessarily require replacement, but it depends on the specific situation. I've encountered this issue before - if it's just minor clogging (like carbon buildup from frequent short city trips), professional cleaning with specialized solvents at an auto shop can restore normal function and save replacement costs. However, if the internal structure is damaged or melted from overheating, cleaning won't work and replacement becomes mandatory. Otherwise, you'll face excessive emissions, reduced engine power, and increased fuel consumption. I recommend a comprehensive diagnosis first to check if oxygen sensors are affected. For minor issues, repair is cost-effective. Neglecting this may trigger the check engine light and cause inspection failures - serious trouble. Regular exhaust system maintenance can extend catalytic converter lifespan.

[VanRebecca]

From an environmental perspective, I believe that a faulty catalytic converter should generally be replaced. It is responsible for purifying harmful gases in the exhaust, such as carbon monoxide and other pollutants. If it malfunctions, emission levels will skyrocket, causing severe air pollution. Many cities now have strict emission regulations, and driving without repairing it could result in fines if caught, and the vehicle will also fail emissions tests. As someone who prioritizes environmental protection, I would rather spend a bit more money to replace it with a new one, as this helps reduce exhaust pollution, benefiting everyone. Trying to save money by not replacing it will ultimately lead to higher fuel costs, making it more expensive in the long run. In fact, regular maintenance while driving, such as periodically driving at high speeds to clear carbon deposits, can delay the occurrence of faults.

[LeAnastasia]

The type of fault determines whether replacement is needed: Blockages can be resolved with chemical cleaning; poisoning, such as from fuel impurities, may require partial repair; but if the internal substrate is shattered, a full replacement is mandatory. A non-functioning catalytic converter can affect engine performance, leading to issues like reduced power and increased fuel consumption. Therefore, I recommend getting it checked first instead of rushing into an expensive replacement. However, prolonged neglect can damage other components, such as the oxygen sensor, making repairs more costly. Overall, replacement isn't mandatory in all cases—repair if possible.