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FREQUENTLY ASKED QUESTIONS
What is a Gross Polluter?
The Smog Check program has identified Gross Polluter (GP) vehicles as a significant source of smog emissions. They usually have emissions 2x that of the deemed failing rate by the state of California.
Once a vehicle is classified or designated as a Gross Polluter it has to initially be tested at a Test Only inspection station. If the vehicle fails this inspection it must undergo repairs and return to a Test only center.
Gross Polluters pollute much more than a the typical vehicle that fails a Smog Check inspection. The emission level at which a vehicle fails as a Gross Polluter varies according the vehicle type and year. Typically they exceed at least one of the gross polluter standards (twice the maximum emission limits).
Older vehicles are not held to the same emissions standards as newer vehicles. Older vehicles were built to less stringent standards when originally manufactured and thus the smog inspection process is developed with this in mind. The vehicle owner of an older vehicle is given a slight handicap or advantage. They must however up keep their vehicle's maintenance.
Do I need a Smog Check?
Smog inspections are generally required during a vehicle's initial registration in California and once, every two years, thereafter. This inspection cycle will continue for as long as the vehicle is registered in this State.
The Smog Check Program applies to 1976 and newer passenger vehicles and trucks powered singly or in combination by:
-Gasoline
-Propane
-Natural gas
-Diesel
-Methanol / Ethanol fuels
Smog Inspections are also required anytime a vehicle is sold or bought in California. During a title transfer the Department of Motor Vehicles will not allow a vehicle to be registered unless it is presented with a valid smog certificate. There are special testing procedures for vehicles, which are classified as "Gross Polluters". These include Test Only and State Referee inspections. If your vehicle requires a Test Only or Referee inspection, your DMV paperwork will advise you of it. Prepare your smog check checklist ahead of time.
Even if a Vehicle a 2012-2013 Model if it is being sold used in the state of California or transferring owners it will need to be smogged (Unless it has been smogged in the last 90 days)
I I Want to add Aftermarket performance parts to My vehicle, Will it pass Smog?
Aftermarket performance products MAY not be authorized for California street use. If you want to enhance your vehicle's performance but don't want to fail the smog test, read the fine print on some of the products out there. You're going to want to find a product which has an Executive Order number. EO numbers are given only to performance products which the State of California has inspected and approved for street use. Performance Products with EO numbers can pass the smog test. Most manufactures of these products will stamp the EO number on their product. In some cases EO Numbered decals are provided with the component and required to be placed under the vehicle's hood. At any rate, the smog station which will be inspecting your vehicle must have the EO number readily available, either via a decal, stamp or the specific component's manual.
Your vehicle will fail the smog test if you are not able to provide EO numbers for you performance products.
Here you might find answers to many frequently asked Questions about Smog Test in California and Emissions in General as well as common terms while having your vehicle smogged.
