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  2. 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 uses 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.).

  3. United States vehicle emission standards - Wikipedia

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

    Emissions from all non-road engines are regulated by categories. [49] In the United States, the emission standards for non-road diesel engines are published in the US Code of Federal Regulations, Title 40, Part 89 (40 CFR Part 89). Tier 1–3 Standards were adopted in 1994 and was phased in between 1996 and 2000 for engines over 37 kW (50 hp ...

  4. Emission standard - Wikipedia

    en.wikipedia.org/wiki/Emission_standard

    The California ARB standard for light vehicle emissions is a regulation of equipment first, with verification of emissions second. The property owner of the vehicle is not permitted to modify, improve, or innovate solutions in order to pass a true emissions-only standard set for their vehicle driven on public highways.

  5. Vehicle inspection - Wikipedia

    en.wikipedia.org/wiki/Vehicle_inspection

    The EU Directive 2014/45 of April 3, 2014 mandates all member states to carry out periodic safety and emission (roadworthiness) inspections for most types of motor vehicles including passenger cars, light and heavy goods vehicles, trailers, tractors with designed speed exceeding 40 km/h and, from 1 January 2022, motorcycles with engine ...

  6. Vehicle emissions control - Wikipedia

    en.wikipedia.org/wiki/Vehicle_emissions_control

    Vehicle emissions control is the study of reducing the emissions produced by motor vehicles, ... California light and medium duty trucks may also use the c-4 system ...

  7. US Senate votes to reject rule to cut greenhouse gas ... - AOL

    www.aol.com/news/us-senate-votes-reject-rule...

    In 2018, the Trump administration repealed a rule issued under former President Barack Obama requiring states to track greenhouse gas emissions from vehicles on the nation's highways.

  8. US EPA must do more to ensure captured carbon stays ... - AOL

    www.aol.com/news/us-epa-must-more-ensure...

    The ethanol industry is particularly hoping CCS will lower its emissions enough to qualify for lucrative low-emission fuel subsidies. (Reporting by Leah Douglas; Editing by Josie Kao) Show comments

  9. Emission test cycle - Wikipedia

    en.wikipedia.org/wiki/Emission_test_cycle

    An emission test cycle is a protocol contained in an emission standard to allow repeatable and comparable measurement of exhaust emissions for different engines or vehicles. Test cycles specify the conditions under which the engine or vehicle is operated during the emission test.