What Does A Smog Check Check?

What Does A Smog Check Check? During a smog check, a licensed technician will attach measuring equipment to your vehicle. Emissions measured include carbon monoxide (CO), carbon dioxide (CO2), hydrocarbons (HC) and oxygen (O2). In some of the nation’s most polluted urban areas, the emissions test also measures levels of oxides of nitrogen (NOx). What … Continue reading What Does A Smog Check Check?