The three sections the California Smog Inspection consists of:

The State of California requires smog stations to test vehicles in the specific order listed above. The first inspection (emissions inspection) is performed by the exhaust gas analyzer "smog machine". During this step of the smog check inspection, the smog machine is looking for the presence of Hydrocarbons, Carbon Monoxides and Nitrous Oxides in your vehicle's exhaust. These are the three (3) undesired chemicals which are responsible for the production of SMOG. The next two inspections, the visual and functional, will be performed both by the smog technician and/or the smog machine.

In order to pass Califoria's emissions test, your vehicle must produce passing results in all three test sections !

1) Emission Inspection

2) Visual Inspection

3) Functional Inspection

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