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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 used 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. Tell-tale (automotive) - Wikipedia

   en.wikipedia.org/wiki/Tell-tale_(automotive)

   The oil pressure idiot light lights when engine oil pressure drops below a predetermined level. The light normally appears when the vehicle ignition is turned on, but the engine is not running, as it detects no oil pressure due to the oil pump not operating (the oil pump is powered off the crankshaft, so only operates when the engine is running ...

4. Indicator lamp - Wikipedia

   en.wikipedia.org/wiki/Indicator_lamp

   An indicator lamp (or indicator light) is an illuminated device that is intended to visually convey a single status to the user of a piece of equipment. Indicator lamp may refer to: Check engine light, a tell-tale warning light in automobiles; Tell-tale (automotive), a more generic class of indicators

5. On-board diagnostics - Wikipedia

   en.wikipedia.org/wiki/On-board_diagnostics

   Included in this system is a proprietary 5-pin ALDL that interfaces with the Engine Control Module (ECM) to initiate a diagnostic request and provide a serial data stream. The protocol communicates at 160 baud with Pulse-width modulation (PWM) signaling and monitors all engine management functions. It reports real-time sensor data, component ...

6. Oil pressure - Wikipedia

   en.wikipedia.org/wiki/Oil_pressure

   Murphy oil pressure gauges with switches that activate on low pressure. Oil pressure is an important factor in the longevity of most internal combustion engines. [1] With a forced lubrication system (invented by Frederick Lanchester), oil is picked up by a positive displacement oil pump and forced through oil galleries (passageways) into bearings, such as the main bearings, big end bearings ...

7. Oil pump (internal combustion engine) - Wikipedia

   en.wikipedia.org/wiki/Oil_pump_(internal...

   Indications of low oil pressure may be that the warning light is on, a low pressure reading on the gauge, or clattering/clinking noises from the engine. Low oil pressure is a problem that must be addressed immediately to prevent serious damage. The leading cause of low oil pressure in an engine is wear on the engine's vital parts.