What is the reason for exceeding the remote sensing emission limits on the road?

[Helen]

The reasons for excessive emissions: First, the main reason is the use of inferior fuel. When refueling, it is advisable to choose gas stations of well-known brands. The use of low-quality fuel can also lead to incomplete combustion in the engine, resulting in carbon deposits. Secondly, a clogged catalytic converter and malfunctioning oxygen sensors are also factors that contribute to excessive emissions. When you notice an unusually strong smell of exhaust, it is important to have your vehicle inspected at a reputable repair shop and address the issue promptly. Second, start by checking the OBD system; then 1. Flush the catalytic converter; 2. Clean the fuel injectors; 3. Clean the throttle body and intake passages; 4. Clean carbon deposits in the combustion chamber; 5. Clean the lubrication system and add a lubrication system repair and protection agent. Parts that may need replacement include spark plugs, fuel injectors, etc. Depending on the vehicle's condition, follow a step-by-step approach starting with the easier tasks. Third, opt for green transportation whenever possible to reduce the use of private cars; if starting the engine in a garage, keep the garage door open or turn on the exhaust fan to ensure proper ventilation; when stuck in traffic, try to turn off the engine.