Nitrogen Oxide (NOx)
Explanation: Nitrogen Oxide (NOx) is a group of highly reactive gases that are produced during the combustion process in internal combustion engines, such as those found in cars. These gases are formed when nitrogen and oxygen in the air react at high temperatures and pressures inside the engine's combustion chamber. NOx emissions are a major contributor to air pollution and can have harmful effects on human health and the environment.
Technical Explanation:
Common Symptoms:
- Increased emissions during vehicle inspections
- Poor fuel efficiency
- Engine knocking or pinging
- Reduced engine performance
Diagnosing:
- NOx emissions can be measured during emissions testing using specialized equipment.
- A diagnostic scan tool can also be used to check for any fault codes related to NOx emissions.
Common Repairs:
- Regular maintenance, such as changing air filters and spark plugs, can help reduce NOx emissions.
- Installing a catalytic converter can help reduce NOx emissions by converting them into less harmful gases.
- Tuning the engine to optimize fuel-air mixture and combustion process can also help reduce NOx emissions.