How to Deal with Excessive Nitrogen Oxide in Vehicle Exhaust?
2 Answers
Switching to higher-grade fuel and driving at high speeds can significantly help clean the oil passages and cylinders of the engine. As long as the three-way catalytic converter has not lost its activity and is not completely blocked, cleaning the three-way catalytic converter can restore its activity. Once the oxygen sensor is damaged, fuel consumption will increase significantly. Therefore, replacing a faulty oxygen sensor plays a crucial role in the vehicle's fuel economy.
I just fixed this issue. When a car's nitrogen oxide (NOx) emissions exceed standards, the first thing I check is the catalytic converter. If it's clogged or worn out, the exhaust filtration fails, causing excessive emissions. Next, I inspect the oxygen sensor—if it's aged, it disrupts the air-fuel ratio, leading to incomplete combustion and higher NOx levels. The solution is to visit a professional shop for diagnostic trouble codes, confirm the issue, and replace the faulty parts. Although the catalytic converter is expensive, it's a must-replace item. Additionally, clean the spark plugs and air filter to ensure the ignition system works properly, and use high-octane fuel or additives to aid cleaning. Don’t slack on regular maintenance, such as inspecting the exhaust system every two years. Exceeding emissions standards not only fails the annual inspection but also pollutes the air we breathe. I’ve seen people stubbornly driving with high emissions and getting fined hundreds—it’s not worth it. After repairs, retest the exhaust, and fuel consumption will drop, saving money and being eco-friendly overall.
