What to Do If the Vehicle Fails the Annual Environmental Inspection?
1 Answers
The implementation of new standards for motor vehicle environmental exhaust emission testing has resulted in many vehicles failing the environmental inspection. If a vehicle fails the environmental inspection, it may be due to blockage or poisoning of the catalytic converter, which requires cleaning or replacement. Generally, after treatment, most vehicles can meet the standards. Below are the specific reasons for failing the annual exhaust emission test: 1. Poor fuel quality. If low-quality fuel is frequently used, it can lead to the accumulation of a large amount of carbon deposits after combustion, which may affect the performance of the exhaust purification system, reduce its service life, increase pollutant emissions, and result in unqualified exhaust emissions. Therefore, before the annual inspection, it is advisable to fill up with high-quality gasoline and drive on the highway before testing. 2. Blockage or poisoning of the catalytic converter. If the vehicle is frequently driven at low speeds or uses inferior fuel, the catalytic converter may become blocked or poisoned. In this case, you can purchase a professional cleaning agent to remove and clean the catalytic converter, or drive at high speeds for a distance, as high-speed driving has a significant effect on cleaning the engine's fuel system and cylinders. Moreover, at high engine speeds, fuel combustion is more complete, which helps flush out dirt and impurities from the fuel system and can remove carbon deposits from the valves, making blocked passages smooth and achieving a cleaning effect.
