What to Do If a Vehicle Fails the Annual Environmental Inspection?
3 Answers
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.
My car failed the environmental inspection last year, possibly due to a deteriorated catalytic converter or severe carbon buildup. The solution is simple: first clean the fuel injectors and air filter, then add a specialized cleaner and take the car for a high-speed run to help restore the catalytic converter's function. If this doesn’t work, go straight to a repair shop for an emissions test and have the mechanic check the oxygen sensor and fuel system. In most cases, a simple repair will get it to pass. Don’t forget regular maintenance, like changing the air filter and engine oil periodically, to prevent issues. For safety, don’t delay—repairs usually cost just a few hundred yuan, avoiding fines or driving restrictions from failing the inspection. I believe the key is timely action—don’t let small problems turn into big troubles. A well-maintained car ensures peace of mind while driving. Environmental issues aren’t just about passing inspections; they also impact air quality. Proactively fixing your car is a small contribution to cleaner air.
When I failed the annual environmental inspection, I directly sought a professional repair shop for diagnosis. The most common issues are problems with the catalytic converter or clogged fuel systems, leading to excessive emissions. I suggest you first check if the air filter is clean and try adding fuel cleaner, but avoid tampering with complex components. If that doesn't work, take it to a 4S shop or certified repair point for inspection and repair; replacing parts can cost just a few hundred yuan—spending some money is better than failing the inspection. Pay attention to using good fuel and reducing idling to prevent similar situations. Don't delay; get it fixed promptly to ensure driving safety. Last time I repaired it, I passed the inspection on the first try, and the car's condition improved significantly.
