What to Do If Vehicle Fails Emission Test?

1 Answers
DiGideon
07/29/25 7:57pm
There are mainly two reasons why a vehicle's emissions fail to meet standards: 1. Poisoned Catalytic Converter: This occurs due to high sulfur content in gasoline or the use of sulfur-phosphorus antioxidant in lubricants. The gasoline and lubricants should be replaced promptly. 2. Catalytic Converter Failure: Catalytic converter failures are categorized into reversible and irreversible failures. Reversible failure happens when the catalytic converter is used beyond its service life, leading to high-temperature deactivation of the catalyst. Irreversible failure is caused by sintering or damage to the catalytic converter. Additional Information: Composition of Vehicle Emissions: The main components of vehicle emissions include carbon monoxide, hydrocarbons, nitrogen oxides, carbon dioxide, sulfur dioxide, lead compounds, and some particulate matter.
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