What to Do If Your Vehicle Fails the Environmental Protection Test?
2 Answers
Vehicles that fail the test should be repaired at an authorized repair shop. Below are the relevant details: 1. Multiple Factors: The emission of pollutants from motor vehicles is influenced by various factors, including tail gas control technology, engine working conditions, fuel quality, and the effectiveness of the three-way catalytic converter. In particular, some vehicle owners do not use their vehicles properly according to the instructions, such as sudden acceleration, hard braking, climbing slopes with heavy loads, or overloading, all of which can degrade the overall condition of the vehicle and lead to excessive tail gas emissions. 2. Pass Rate: The pass rate of tail gas emissions testing is closely related to the driving habits of the owner and whether the vehicle receives regular maintenance. Therefore, daily maintenance is crucial. It is advisable for owners to use clean fuels and ensure that the engine does not exhibit any leaks or malfunctions before the test.
My car also failed the emissions test last year due to excessive exhaust emissions, but don't worry too much. Common issues include an aged or clogged catalytic converter, which loses effectiveness over time; faulty oxygen sensors can also cause inaccurate readings; or excessive engine carbon buildup and dirty air filters. I recommend first going to a professional repair shop to scan for trouble codes with a computer to identify the specific cause before taking targeted action. In my case, I cleaned the throttle body and fuel injectors, replaced the air filter, added a bottle of fuel system cleaner and drove at high RPMs on the highway - it passed the second test. For regular maintenance, remember to change the oil and three filters periodically to avoid last-minute fixes before the annual inspection, which saves a lot of hassle.
