California requires a smog check on many vehicles older than six model years as soon as every two years, or once a year in case your automobile is tagged like a vehicle that is high-polluting. You cannot legally drive your car in the state if you do not abide by this law. So, what exactly occurs during smog checks?  Here, we’ll break the process down.

Measure / Examine

A licensed specialist will connect measuring equipment to your vehicle and perform the next assessments:

  • Emissions Inspection – Emissions assessed consist of carbon monoxide (CO), carbon dioxide (CO2), hydrocarbons (HC) and oxygen (O2), and oxides of nitrogen (NOx).
  • Aesthetic Inspection and Functional Inspection – Ensure your emissions equipment is with in place, working, and performing its job of decreasing pollutants from your automobile’s exhaust.
  • Existing testing methods include:
  • Two-Speed Idle (TSI) This test analyzes fatigue emissions through the tailpipe since the engine idles, very first at high then at reduced speed, and is generally for older vehicles signed up before 1995.
  • Acceleration-Simulation-Mode: often forget for older cars, the Acceleration-Simulation-Mode test-measures release under simulated operating conditions making use of a drive-on dynamometer, which can be similar to a treadmill machine for the automobile. You can also use smog coupons.
  • On-Board Diagnostics (OBDI) – in this test, information is downloaded from the vehicle’s diagnostics that are on-board.


The dimensions taken are recorded and turn straight away available  to your state’s company accountable  for keeping track of smog and automobile emissions. In California, it really is transmitted to the Bureau of Automotive Repair (club).

Get Outcomes

Following completion associated with check that is smog whether pass or fail, the specialist will give you a duplicate regarding the test results, labeled as the Vehicle Inspection Report (VIR), plus  a receipt for  payment.

Pass or Fail

In the event your automobile passes evaluation, you can easily lawfully drive in California! (Until it’s time for the smog check that is next.)

If for example the car fails its smog test Santee, you shall get guidelines on  what needs to  be repaired. You can easily do the repair yourself or being it up to  a licensed mechanic shop, then stop straight back at any DEKRA station for your no-cost retest. Your bill will note the amount  of time allotted for your retest and repair, and it is important to be prompt as proprietors will likely to be ticketed if they are caught operating a vehicle past its deadline.

This step-by-step explanation should give you  a obvious image  of just what actually happens throughout  a check that is smog. Check  your vehicle timely and drive safer!

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