What to Do If Your Car Fails the Emissions Test?
2 Answers
Switch to higher-grade gasoline. For example, if your car uses 92-octane gasoline, wait until the current fuel is almost used up and then fill up with 97-octane gasoline. If your car fails the emissions test, it might be due to faulty spark plugs, which need to be replaced at a repair shop. Check whether the excessive emissions are caused by issues with the fuel injectors, fuel lines, or catalytic converter. Typically, you should first clean the fuel injectors and then the fuel lines.
My car failed the annual exhaust emission test several times due to exceeding standards. To address this, we need to troubleshoot step by step: First, check if the spark plugs and ignition coils are aged, as wear can affect combustion efficiency; then inspect the air filter and replace it immediately if it's dirty; try adding some fuel system cleaner to remove carbon deposits from the fuel injectors. If the problem persists, the catalytic converter might be clogged and require professional cleaning or replacement. Always use Sinopec 97-octane fuel and avoid low-quality fuel to save money, as excessive carbon buildup increases emissions. Additionally, regularly driving on highways allows the engine to burn fuel completely, helping prevent issues. Failing to address exhaust emission problems promptly not only results in fines but also accelerates part wear and increases fuel consumption. It's recommended to include emission testing during annual maintenance checks.
