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  2. California Smog Check Program - Wikipedia

    en.wikipedia.org/wiki/California_Smog_Check_Program

    In 2004, California approved the world's most stringent standards to reduce auto emissions, and the auto industry threatened to challenge the regulations in court. The new regulations required car makers to cut exhaust from cars and light trucks by 25% and from larger trucks and SUVs by 18%, standards that must be met by 2016. [28]

  3. Vehicle inspection - Wikipedia

    en.wikipedia.org/wiki/Vehicle_inspection

    To pass the inspection the vehicle must not exceed the mandated emission level (currently Euro-3), the brakes must have no leaks and the brake forces must be symmetrical, steering slip must not exceed the mandated parameters (from 10° for cars to 25° for heavy trucks), all lights must provide the required color, aim and brightness of the ...

  4. Check engine light - Wikipedia

    en.wikipedia.org/wiki/Check_engine_light

    A check engine light or malfunction indicator lamp (MIL), is a tell-tale that a computerized engine-management system used to indicate a malfunction or problem with the vehicle ranging from minor (such as a loose gas cap) to serious (worn spark plugs, engine problems or a faulty oil valve, etc.).

  5. Vehicle inspection in the United States - Wikipedia

    en.wikipedia.org/wiki/Vehicle_inspection_in_the...

    Vehicle emissions inspection station in Wisconsin. Arizona – biennially, in Phoenix and Tucson metro areas only, depending on age and type of vehicle. [28]California – biennially for all vehicles from out-of-state, regardless of age; and all vehicles made after 1975 which are more than six years old in all or some zip codes in 41 out of 58 counties.

  6. United States vehicle emission standards - Wikipedia

    en.wikipedia.org/wiki/United_States_vehicle...

    As of 2009, light-duty trucks must meet the same emissions standards as passenger cars. Tier II regulations also defined restrictions for the amount of sulfur allowed in gasoline and diesel fuel , since sulfur can interfere with the operation of advanced exhaust treatment systems such as selective catalytic converters and diesel particulate ...

  7. North Carolina moves to end vehicle emissions testing in ...

    www.aol.com/north-carolina-moves-end-vehicle...

    The N.C. Division of Air Quality will ask the U.S. EPA to approve a plan to end annual emissions inspections in 18 of the 19 counties where it is still required.

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