What to Do If Your Vehicle Fails the Annual Environmental Inspection?

[SanJayden]

If your vehicle fails the inspection due to environmental reasons, it is because the pollutants in the exhaust emissions exceed the limit. Here are the detailed explanations: 1. Check if there is an issue with the car's catalytic converter: The catalytic converter processes pollutants through oxidation and reduction, converting them into harmless carbon dioxide, nitrogen, and water, thereby achieving purification. If the catalytic converter malfunctions, the pollutants in the exhaust will increase. You can try driving on the highway before the inspection to raise the catalytic converter to its optimal operating temperature. 2. Inspect the oxygen sensor and air filter: Problems with the oxygen sensor or air filter can cause the exhaust emissions to fail the test. These components should be repaired before the annual inspection. 3. Check the quality of the gasoline used: If the gasoline is of poor quality, you can try filling half a tank with E10 ethanol gasoline before the inspection.