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

[OJessica]

Solutions for a vehicle failing the annual environmental inspection: 1. Replace the spark plugs; 2. Adjust the ignition timing; 3. Clean the throttle body with a cleaning agent; 4. Switch to 97-octane gasoline or 97-octane ethanol gasoline; 5. Before filling out forms and paying fees at the inspection station, ensure the vehicle is idling in a warmed-up state; 6. Use a vehicle exhaust purifier. The primary reason for failing the environmental inspection is excessive pollutants in the vehicle's exhaust, which do not meet national standards. In such cases, consider whether the issue lies with the catalytic converter. The catalytic converter contains three precious metals: platinum, rhodium, and palladium. Under normal conditions, the catalytic converter undergoes oxidation and reduction processes, converting harmful emissions into harmless carbon dioxide, nitrogen, and water, thereby achieving purification.