California Smog Check Program Laws & Regulations

 California's Smog Check Program Laws & Regulations

 

How to Pass the Smog Check. It's a Easy 3-Part Test!

How to PASS the Smog Check. It's a Easy 3-Part Test!

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Under Your Hood   The NEW Visual Smog Inspection

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 FAQ's - California Emissions Questions & Answers

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SMOG TEST ONLY What is a Test Only Smog Station?

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So what can I do to make sure my car passes?

First, let's look at the three sections the Smog Inspection consists of:

NOTE: 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.

Enhanced Smog Test - In parts of California where smog pollution is higher, vehicle owners are now required to complete an "Enhanced" version of California's smog test. The "Enhanced" smog test requires your vehicle to be driven on a dynamometer while the smog machine collects emissions samples from the tailpipe. The "Enhanced" smog test has been proven to retrieve a more accurate sample of a vehicle's emissions output, then it's predecessor, the "Basic" smog test. The "Basic" smog test requires vehicles to be tested, only at idle and 2500 rpms. "Basic" smog test vehicles do not need to be driven on a dynomometer.

Basic Smog Test - Counties in California with low smog pollution require the "Basic" smog test. If your county has been added to the "Enhanced" smog test requirement list, the smog stations in your local area will have the neccessary equipment to test your vehicle. No specific action will be required by the vehicle owner.

Change of Ownership - Counties with even less smog pollution are designated as "Change of Ownership" areas. In Change of Ownership parts of the state, smog checks are only required when a vehicle is bought or sold, and when a used vehicle is imported into the state of California. New vehicles imported into California by the vehicle manufacturer do not need smog checks. These vehicles are California certified during production.


STEP 1. Please select a type of smog check service center, enter zipcode, Click GO!
Test Only or Gold Shield      Smog Check Certification
Regular Smog Check Test      and Certification Required
Smog Test Repair Stations
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OBDII Smog Machine Link - The State of California now requires all vehicles 1996 and up, to communicate directly with the smog machine during the smog test. This is achieved via your vehicle's OBDII Data Link Connecter. As part of the smog inspection process, the smog technician will connect a Data Cable from the smog machine to your vehicle's OBDII Data Link Plug. This cable will deliver important "Check Engine" codes and "Readiness Flags" from the engine's computer system to the state's smog machine. Emissions related failure codes will cause your vehicle to fail the smog inspection. The failure codes will be printed on the Vehicle Inspection Report (VIR) which will be given to you by the smog station.

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