What are the consequences of a clogged catalytic converter?

[Melo]

The consequences of a clogged catalytic converter are as follows: 1. Mild clogging: The specific manifestation of mild clogging is a reduction in the vehicle's exhaust purification capability, but no abnormalities can be detected without professional testing equipment. 2. Moderate clogging: The specific manifestations of moderate clogging include a further reduction in the vehicle's exhaust purification capability, along with increased fuel consumption, decreased engine power, and the possible illumination of the engine fault indicator light. 3. Severe clogging: When the catalytic converter is severely clogged, in addition to the above symptoms, the normal operation of the engine will be greatly affected due to the continuous accumulation of high-temperature exhaust gases that cannot be effectively expelled. This may even lead to engine stalling, and in more severe cases, the exhaust pipe may become red-hot due to high temperatures, potentially causing spontaneous combustion.

[SanStephen]

As an ordinary driver, I find it most annoying when the catalytic converter gets clogged. The car feels like it's being choked, with no response when you press the accelerator, sluggish acceleration, and it becomes particularly dangerous when overtaking, making rear-end collisions more likely. Fuel consumption also skyrockets, burning through the tank much faster and costing hundreds more in gas money each month—just not worth it. Emissions exceed the standard, and it's almost certain to fail the annual inspection, leaving no choice but to spend money on a new part. Even worse, sometimes a pungent smell of hydrogen sulfide comes out of the exhaust pipe, like rotten eggs, which isn't good for your health if inhaled too much. Over time, the engine bears a heavy load and is prone to overheating, potentially damaging other components, such as the oxygen sensor, with repair costs through the roof. A friend's car ended up with engine failure due to delayed action, costing over ten thousand to fix. So, at the first sign of poor exhaust flow or a warning light, get it checked at a professional shop immediately—don't let a small issue turn into a big problem.

[DeNadia]

I enjoy maintaining my car myself, and the consequences of a clogged catalytic converter are quite noticeable. The engine backpressure increases, power output weakens, and you can feel the engine shaking with sluggish acceleration. Poor exhaust flow leads to excessive emissions, including harmful gases like carbon monoxide, which is unfriendly to the environment. The most annoying part is that it might even damage the oxygen sensor, costing over a thousand yuan to replace. During annual inspections, it can cause delays, resulting in re-inspections and fines. From my personal experience, uneven exhaust pipe temperatures are a warning sign. Using high-quality gasoline regularly helps prevent buildup and clogging. Severe clogging can cause engine overheating, potentially damaging the cylinders—costly repairs that aren’t worth it. Timely cleaning with professional tools or replacing the converter is key to saving hassle and money.

[Elliott]

As an environmental advocate, when the three-way catalytic converter is clogged, my concern is that it renders the exhaust treatment ineffective, allowing harmful gases like hydrocarbons to be directly emitted, polluting the air and exacerbating the greenhouse effect. The impact on human health is significant, especially during urban traffic jams when the surrounding air becomes murky, and long-term inhalation can lead to respiratory issues. Exceeding emission standards also violates environmental regulations, potentially resulting in fines. After clogging, fuel consumption increases as well, wasting resources and being environmentally unfriendly. I recommend paying attention to the exhaust condition while driving and seeking timely repairs if unusual odors or power loss are noticed. Simple maintenance can significantly reduce emissions, protecting everyone's health and lessening the burden of social pollution—a win-win situation.