Does a Deteriorated Three-Way Catalytic Converter Affect the Vehicle?

[MacCarter]

A deteriorated three-way catalytic converter not only significantly increases fuel consumption, reduces power output, and causes exhaust emissions to exceed standards, but in more severe cases, it can cause the exhaust pipe to glow red-hot, potentially leading to vehicle self-ignition. For a long time, auto repair shops have lacked effective preventive measures or treatment methods for a deteriorated three-way catalytic converter. The only solution for a deteriorated catalytic converter is replacement. How to determine the condition of a 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 visible damage, it is likely that the catalytic converter has been compromised. If there are noticeable gray spots in the center of the converter's protective cover, severe discoloration spots, or purple marks on the shell, the catalytic converter may have suffered from overheating. Check the engine's exhaust condition. Place your hand near the exhaust pipe outlet to feel the exhaust flow and check whether the catalytic converter is clogged or if there is restricted exhaust flow. Another method is to open the air filter, remove the filter element, and observe whether exhaust gas flows backward during rapid acceleration, indicating restricted exhaust flow. To assess the condition of the TWC (Three-Way Catalyst), also check whether the secondary air injection pump is functioning properly. Use an infrared thermometer for judgment. Compare the temperature difference between the front and rear of the TWC using an infrared thermometer. If the temperature difference between the inlet and outlet of the catalytic converter is less than 10°C, the TWC is likely damaged.

[CaliAnn]

Aging of the catalytic converter has significant impacts on a car. I recall that the catalytic converter is primarily responsible for reducing exhaust pollutants. When it ages, its conversion efficiency decreases, leading to excessive emissions that may cause the vehicle to fail annual inspections. Increased exhaust emissions also harm the environment, potentially worsening urban air quality. In terms of vehicle performance, fuel consumption rises, power output diminishes, and the car may feel sluggish during acceleration, as if being dragged down. Worse still, the engine warning light might illuminate due to the oxygen sensor detecting exhaust issues. If left unaddressed, a clogged catalytic converter increases exhaust backpressure, placing additional strain on the engine and potentially triggering further malfunctions. To avoid these issues, I regularly use an OBD diagnostic tool to check for fault codes and ensure high-quality fuel is used to minimize buildup. Replacing a catalytic converter is costly, but timely repairs help maintain the car's health.

[Evan]

Aging of the catalytic converter really affects the driving experience. When it's aged, the exhaust doesn't flow smoothly, making the engine feel like it's struggling to breathe, with delayed acceleration response and a lack of power. Fuel consumption also increases, costing an extra few tens of dollars each month, which is frustrating. The exhaust emits unpleasant odors, especially noticeable during cold starts, making it uncomfortable inside the car. The oxygen sensor frequently triggers errors, lighting up the malfunction indicator lamp and distracting the driver. Over time, excessive backpressure may even damage the pistons or cylinders. I remember my car had similar issues, but after replacing the catalytic converter promptly, it returned to normal. The annual inspection pass rate also improved, and I felt less guilty about environmental impact. Regular maintenance, such as paying attention to the ignition system and fuel filter, can help extend the lifespan of the catalytic converter.

[LeArya]

Aging catalytic converters mean spending more money. When they age and emissions exceed standards, failing the annual inspection leads to repeated testing, wasting time and adding costs. Repairing or replacing a catalytic converter costs thousands, putting pressure on your wallet. A clogged catalytic converter affects the engine, potentially damaging oxygen sensors or the ECU, causing chain reactions that double repair costs. Increased fuel consumption means higher monthly gas expenses, making it not worthwhile in the long run. I make it a habit to check the exhaust system every six months, addressing minor issues early to avoid major repairs. Keeping the catalytic converter in good condition also boosts the resale value of the car, making it more profitable when selling.