What is a Smog Check?

Official California Smog Check Station in HBA California smog check is made up of multiple tests. The smog technician follows state testing procedures that determine if the vehicle passes. The end result of a “pass” is a smog certificate.

In order for your vehicle to receive a Smog Check certificate, it must pass all the following elements of a Smog Check inspection:

  • Visual inspection, in which required emissions control components and systems are identified, and must appear connected and functional.
  • Functional inspection which includes, as applicable, checking the functionality and/or integrity of the emissions control malfunction indicator light (“Check Engine”, etc), the ignition timing, the gas cap, and the Exhaust Gas Recirculation (EGR) system, if the vehicle is so equipped and a Two-Speed Idle (TSI) test is being performed. A Low Pressure Fuel Evaporative Test (LPFET) is performed on all 1995 and older vehicles. A functional check of a vehicle’s On-Board Diagnostic (OBD) system is also performed on 1996 and newer vehicles. Diagnostic information stored in the vehicle’s computer is reported on the Vehicle Inspection Report (VIR) that the motorist receives at the end of the Smog Check inspection. OBD information can save time and money when repairs are required.
  • Tailpipe emissions test, which measures exhaust emissions using a probe inserted into the vehicle’s tailpipe during testing. Vehicles pass or fail this part of the Smog Check inspection based on established emission standards, sometimes called cutpoints.

Above info courtesy of California BAR:



One Reply to “What is a Smog Check?”

  1. Mike

    You can not find a better smog station. Clean, efficient, friendly, and the individual working the front desk… great attitude and sense of humor. The owner Danny is personable and will answer any question you might have.


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