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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. Crankshaft position sensor - Wikipedia

    en.wikipedia.org/wiki/Crankshaft_position_sensor

    A crank sensor (CKP) [1] [2] [3] is an electronic device used in an internal combustion engine, both petrol and diesel, to monitor the position or rotational speed of the crankshaft. This information is used by engine management systems to control the fuel injection or the ignition system timing and other engine parameters.

  4. Ignition timing - Wikipedia

    en.wikipedia.org/wiki/Ignition_timing

    Pressure in cylinder pattern in dependence on ignition timing: (a) - misfire, (b) too soon, (c) optimal, (d) too late. In a spark ignition internal combustion engine, ignition timing is the timing, relative to the current piston position and crankshaft angle, of the release of a spark in the combustion chamber near the end of the compression stroke.

  5. On-board diagnostics - Wikipedia

    en.wikipedia.org/wiki/On-board_diagnostics

    Since OBD-II stores trouble codes for emissions equipment, the testing computer can query the vehicle's onboard computer and verify there are no emission related trouble codes and that the vehicle is in compliance with emission standards for the model year it was manufactured.

  6. Sudden unintended acceleration - Wikipedia

    en.wikipedia.org/wiki/Sudden_unintended_acceleration

    Sudden uncommanded opening of engine throttle in certain models of modern, ECU-controlled automobiles have been replicated multiple times in laboratory settings. [ 21 ] [ 22 ] A negative surge of voltage (down to 7V) can cause rebooting of the ECU, resulting in the output APS (accelerator position) and TPS (throttle position) reaching 100% ...

  7. No fault found - Wikipedia

    en.wikipedia.org/wiki/No_fault_found

    The unit is then checked, but no anomaly is detected by the maintainer. Consequently, the unit is returned to service with no repair performed. [1] [2] [3] If there is an underlying fault that has not been detected the unit may be returned for repair several times with no fault identified. Alternative descriptors include: [4] No fault found (NFF)

  8. Contact breaker - Wikipedia

    en.wikipedia.org/wiki/Contact_breaker

    The contact breaker is operated by an engine-driven cam.On an engine with a distributor, the contact breaker can be found beneath the distributor cap.The position of the contact breaker is set so that it opens (and hence generates a spark) at exactly the optimum moment to ignite the fuel/air mixture.

  9. Error detection and correction - Wikipedia

    en.wikipedia.org/wiki/Error_detection_and_correction

    The on-line textbook: Information Theory, Inference, and Learning Algorithms, by David J.C. MacKay, contains chapters on elementary error-correcting codes; on the theoretical limits of error-correction; and on the latest state-of-the-art error-correcting codes, including low-density parity-check codes, turbo codes, and fountain codes.