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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.).
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.
An odometer or odograph is an instrument used for measuring the distance traveled by a vehicle, such as a bicycle or car. The device may be electronic, mechanical, or a combination of the two ( electromechanical ).
Measuring instruments in fiction: Captain Nemo and Professor Aronnax contemplating thermometers, barometers, clocks, etc. in Jules Verne's 1869-1870 science fiction novel Twenty Thousand Leagues Under the Seas Fun measuring instruments: a Love Meter and strength tester machine at a Framingham, Massachusetts rest stop.
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Like other sub-functions in this list, there are manufacturer-specific reserved values that offer unique and/or specific functionality. 0x27 0x67 Security Access Security check is available to enable the most security-critical services. For this purpose a "Seed" is generated and sent to the client by the control unit.
Odometer fraud, also referred to as "busting miles" (United States) or "clocking" (UK, Ireland and Canada), is the illegal practice of rolling back odometers to make it appear that vehicles have lower mileage than they actually do. Odometer fraud occurs when the seller of a vehicle falsely represents the actual mileage of a vehicle to the buyer.
Mid-range versions often include information on fuel, speed, distance, cardinal heading (compass), and elapsed time. The most advanced trip computers are reserved for high-end cars and often display average calculations for two drivers, a stop watch, tire-pressure information, over-speed warnings, and many other features.