What are the causes and solutions for excessive exhaust emissions?

[StNaomi]

The main reasons for failing annual vehicle exhaust emission tests are poisoning and failure of the three-way catalytic converter. The specific causes and solutions are as follows: Three-way catalytic converter poisoning: Three-way catalytic converter poisoning occurs due to high sulfur content in gasoline, the use of sulfur-phosphorus antioxidants in lubricants, and traffic congestion. When this happens, purchase a bottle of cleaning agent from the auto parts market to perform a three-way cleaning maintenance on the engine. After maintenance, the vehicle's exhaust emissions will meet the annual inspection standards. Three-way catalytic converter failure: Three-way catalytic converter failure can be categorized as reversible or irreversible. Reversible failure is caused by prolonged use of the catalytic converter and high-temperature deactivation of the catalyst. Irreversible failure results from sintering or damage to the catalytic converter. In such cases, purchase a bottle of three-way maintenance agent from the auto parts market to perform maintenance on the engine. During the process, if a strong sulfur dioxide odor is emitted, it indicates reversible failure; otherwise, it is irreversible. Subsequently, the vehicle should be taken to a repair shop for maintenance or replacement.

[Juliana]

I've been driving for nearly twenty years and have encountered many issues with excessive exhaust emissions. The main cause is incomplete combustion in the engine, such as when the air filter is clogged, leading to insufficient air intake and incomplete fuel combustion, resulting in higher emissions. Other factors include aging oxygen sensors or failed catalytic converters, which lose their purification function. The solution is quite simple: regular maintenance is key. Replace the air filter every six months and check the spark plugs and sensors. If emissions exceed the standard, don't ignore it—take the car to a repair shop immediately for diagnostic testing to identify specific fault codes. You might need to clean the fuel injectors or replace the catalytic converter. Remember to use qualified gasoline to avoid impurities and develop good habits to reduce idling time. This is an environmental issue—excessive exhaust emissions pollute the air and affect health. Maintaining your car on time not only saves money but also helps protect the urban environment.

[EllaFitz]

As a car enthusiast, I have some knowledge about exhaust technology. The main reason for exceeding emission standards is decreased engine efficiency, such as a faulty oxygen sensor causing an imbalanced fuel mixture and increased hydrocarbon emissions. A damaged catalytic converter also struggles to purify exhaust. For solutions, directly scan the trouble codes using the onboard OBD system to locate the issue. Then replace the faulty sensor or catalytic converter components. For maintenance, regularly replace air and fuel filters and use cleaning agents to remove carbon deposits. Using high-quality fuel can reduce exhaust emissions. It's advisable not to wait until emissions exceed standards to make repairs; conduct routine checks like observing exhaust smoke color for preliminary judgment. Better car emissions contribute to cleaner urban air.

[DiRobert]

Excessive exhaust emissions can result from various causes, commonly including clogged air filters leading to insufficient air intake and poor combustion. A blocked or failed catalytic converter can also cause emissions to exceed standards. Solutions involve replacing the air filter and catalytic converter. Check the oxygen sensor's functionality and replace it if readings are abnormal. Regular use of high-quality fuel to avoid impurities and periodic cleaning of the fuel injection system are recommended. If emissions exceed standards, avoid long-distance driving and seek professional repair services to ensure compliance and safety.