Can a Deteriorated Three-Way Catalytic Converter Still Be Used?
3 Answers
After a three-way catalytic converter has deteriorated, it should not continue to be used and should be replaced with a new one promptly. Below is detailed information about the automotive three-way catalytic converter: Overview: The three-way catalytic converter is the most important external purification device installed in a vehicle's exhaust system. It converts harmful gases such as CO, HC, and NOx emitted from vehicle exhaust into harmless carbon dioxide, water, and nitrogen through oxidation and reduction reactions. Other Information: When high-temperature vehicle exhaust passes through the purification device, the purifying agents in the three-way catalytic converter enhance the activity of CO, HC, and NOx gases, promoting their oxidation-reduction chemical reactions. This converter is called 'three-way' because it simultaneously converts the three major harmful substances in exhaust gases into harmless substances.
My old car has been running for over a decade. After the catalytic converter aged and I kept using it for a while, it caused quite a few issues. The exhaust became noticeably louder, fuel consumption increased slightly, and acceleration felt sluggish—especially noticeable when going uphill. An aged converter has lower efficiency in processing exhaust, making it easier to exceed emission standards, which might cause it to fail during annual inspections. Once, I stubbornly refused to replace it, and later the check engine light stayed on constantly. The mechanic said the oxygen sensor was also damaged as a result, costing me several hundred more to fix. I’d advise not delaying too long—get the emissions checked regularly, and replace the converter promptly if it’s aging to avoid higher costs later. Daily maintenance, like avoiding low-quality fuel, can also slow down the aging process. Keeping it well-maintained ensures the car runs smoothly.
Having worked in the automotive repair industry for many years, I've encountered numerous cases of aging catalytic converters. The vehicle can still start and run, but the converter's functionality is significantly reduced, failing to transform harmful emissions, with a noticeable increase in black exhaust smoke. When severely aged, exhaust blockage can easily lead to engine overheating or power hesitation. I recall a customer who used it continuously for a year, experiencing a 20% surge in fuel consumption and being fined for exceeding emission standards during the annual inspection. During repairs, it's essential to assess the extent of aging; minor blockages might be resolved with cleaning, but in most cases, replacing the part is recommended. The key is to regularly monitor oxygen sensor data to prevent chain reactions, addressing issues early to save both hassle and money.
