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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. On-board diagnostics - Wikipedia

    en.wikipedia.org/wiki/On-board_diagnostics

    This OBD-II came in two models OBD-IIA and OBD-IIB. OBD-II standardization was prompted by emissions requirements, and though only emission-related codes and data are required to be transmitted through it, most manufacturers have made the OBD-II Data Link Connector the only one in the vehicle through which all systems are diagnosed and ...

  4. OBD-II PIDs - Wikipedia

    en.wikipedia.org/wiki/OBD-II_PIDs

    OBD-II PIDs (On-board diagnostics Parameter IDs) are codes used to request data from a vehicle, used as a diagnostic tool.. SAE standard J1979 defines many OBD-II PIDs. All on-road vehicles and trucks sold in North America are required to support a subset of these codes, primarily for state mandated emissions inspections.

  5. Template:Opel engine codes - Wikipedia

    en.wikipedia.org/wiki/Template:Opel_engine_codes

    Opel engine codes explained 1. = Emissions controls 2./3. = Displacement (in tenths of liters) 4. = Compression ratio 5. = Fuel feed (only on gasoline engines) 5./6. = Special conditions

  6. Catalytic converter - Wikipedia

    en.wikipedia.org/wiki/Catalytic_converter

    Vehicles equipped with OBD-II diagnostic systems are designed to alert the driver to a misfire condition by means of illuminating the "check engine" light on the dashboard, or flashing it if the current misfire conditions are severe enough to potentially damage the catalytic converter. [62] On-board diagnostic systems take several forms.

  7. Secondary air injection - Wikipedia

    en.wikipedia.org/wiki/Secondary_air_injection

    The pump's air intake is filtered by a rotating screen or the vehicle air filter to exclude dirt particles large enough to damage the system. Air is delivered under light pressure to the injection point(s). A check valve prevents exhaust forcing its way back through the air injection system, which would damage the pump and other components.

  8. Ignition interlock device - Wikipedia

    en.wikipedia.org/wiki/Ignition_interlock_device

    The interlock device is located inside the vehicle, near the driver’s seat, and is directly connected to the engine’s ignition system. [1] It is a form of electronic monitoring . An ignition interlock interrupts the signal from the ignition to the starter until a valid breath sample is provided that meets maximal alcohol guidelines in that ...

  9. Onboard refueling vapor recovery - Wikipedia

    en.wikipedia.org/wiki/Onboard_refueling_vapor...

    An onboard refueling vapor recovery system (ORVR) is a vehicle fuel-vapor emission control system. It captures potentially harmful volatile organic compounds (VOCs) during refueling. [ 1 ] Without such a system, fuel vapors trapped inside gas tanks would be released into the atmosphere, each time the vehicle was refueled.