the Price of a Smog Check

In order to register a vehicle in California, it must first pass a smog test to meet the state's anti-pollution standards. When I first moved to the state, I had my car tested and the test measured various emission control systems, including PCV, catalytic converter, spark controls, vacuum lines to sensors/switches, wiring to sensors, fillpipe restrictor, oxygen sensor, liquid fuel leaks, and fuel evaporative controls. The inspection station also conducted a visual examination of the engine and the exhaust system. The total cost was $57.00 and there was no state sales tax or other charge on top of the smog check fee.

The entire process took about 90 minutes because the inspection station is required to conduct tests at two different speeds - 15 mph and 25 mph - so it takes time to calibrate the machines and measure the necessary aspects of the emission system. The inspector was helpful in explaining the steps to me and the meaning of the various testing categories, and he took time to review the results with me when the tests were complete. It is a confusing process, but the inspector made it simpler and I was more comfortable once I knew what would happen, which included testing the levels of oxygen, carbon dioxide, and nitrogen oxide. My car did pass the tests, but some of the levels were close to the maximum allowable emissions. The price was fair and competitive with the other inspection stations in the area, and the results are submitted to the state electronically, which is also helpful.

Having the oil changed in your car a few days before the test is said to make it more likely to pass the tests, and driving your car for a few miles before the test is also recommended by some people, as well as getting the test done in the morning because the testing area is generally cleaner at that time.