What are the causes of excessive vehicle exhaust emissions?

1 Answers
OLola
07/29/25 6:28pm
Excessive vehicle exhaust emissions can be caused by: 1. Engine misfire; 2. Spark plug oil leakage; 3. Failed catalytic converter; 4. Dirty intake system, exhaust system, or fuel system; 5. Faulty oxygen sensor; 6. Aging components, poor contact, or poor sealing; 7. Incomplete fuel combustion. Solutions for excessive vehicle exhaust emissions include: 1. Replacing the engine; 2. Replacing spark plugs; 3. Replacing the catalytic converter; 4. Checking the oxygen sensor; 5. Cleaning the intake system, exhaust system, and fuel system; 6. Adding additives to the engine oil. Vehicle exhaust emissions contribute to environmental pollution and contain pollutants such as carbon monoxide, hydrocarbons, nitrogen oxides, sulfur dioxide, lead compounds, and particulate matter.
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