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  2. Catalytic converter - Wikipedia

    en.wikipedia.org/wiki/Catalytic_converter

    Catalytic converters remove only 20–40% of PM so particulates are cleaned up by a soot trap or diesel particulate filter (DPF). In the U.S., all on-road light, medium, and heavy-duty diesel-powered vehicles built after 1 January 2007, are subject to diesel particulate emission limits, and so are equipped with a 2-way catalytic converter and a ...

  3. Exhaust system - Wikipedia

    en.wikipedia.org/wiki/Exhaust_system

    It is a U.S. legal requirement to have a catalytic converter. [3] [4] Converters may not be removed from a vehicle that is used only for "off-road" driving in the United States. [5] The main purpose of a catalytic converter on an automobile is to reduce harmful emissions of hydrocarbons, carbon monoxide, and nitrogen oxides into the atmosphere.

  4. 2020–2022 catalytic converter theft ring - Wikipedia

    en.wikipedia.org/wiki/2020–2022_catalytic...

    [11] [14] The codes on catalytic converters identify the make, model and place of origin of catalytic converters, which in turn identify their value, due to variation in state emission laws. [ 11 ] [ 18 ] As an example, GD3 EA6 denotes a Toyota Prius manufactured between 2004 and 2009; [ 11 ] [ 14 ] at the peak of the PRP metal prices, its high ...

  5. LA retiree gets shocking surprise 3 years after car’s ... - AOL

    www.aol.com/finance/la-retiree-gets-shocking...

    The mechanic told Hill that her replacement catalytic converter didn’t meet California’s smog test requirements and they couldn’t sign off on her car as legal to drive. She took it to ...

  6. United States vehicle emission standards - Wikipedia

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

    OBDII + catalytic converter tamper check + fuel cap leak test for 1996 or later vehicles. Tailpipe/tampering testing for 1995 and older vehicles. Any diesel vehicle with a model year of 1975 and newer and a GVWR of 10,500 lbs or less. Annual testing. OBDII + catalytic converter tamper check + fuel cap leak test for 2002 or later vehicles.

  7. Diesel particulate filter - Wikipedia

    en.wikipedia.org/wiki/Diesel_particulate_filter

    Unlike a catalytic converter which is a flow-through device, a DPF retains bigger exhaust gas particles by forcing the gas to flow through the filter material before exiting; [2] [29] however, the DPF does not retain small particles. Maintenance-free DPFs oxidise or burn larger particles until they are small enough to pass through the filter ...

  8. Emission standard - Wikipedia

    en.wikipedia.org/wiki/Emission_standard

    The ECE 15/05 norms (also known as the Luxemburg accord, strict enough to essentially require catalytic converters) began taking effect gradually: the initial step applied to cars of over 2000 cc in two stages, in October 1988 and October 1989. [2] There followed cars between 1.4 and 2.0 liters, in October 1991 and then October 1993.

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