Engine Oil Light Diagnosis
What is an engine oil light?
This warning light is displayed to alert the driver of low engine oil pressure. If this light illuminates, you should pull over to a safe place and shut off the engine immediately.
How does the engine oil light work?
This light is activated directly or indirectly by the oil pressure sensor. Pressurized oil is pumped through the engine for cooling, bearing lubrication, and to actuate oil fed components. When oil pressure drops below a specified range, the engine control unit will illuminate the oil pressure warning light. In some vehicles, the engine computer will also shut the engine off as a fail safe.
What are the symptoms related to an engine oil light?
The engine oil pressure warning light will come on if the engine oil pressure is low, or if the oil pressure sensor is faulty. In either case, engine power may be reduced significantly. The check engine light may also illuminate, and an on-board diagnostic (OBD) trouble code will be stored in the vehicle's computer.
Can I drive with an engine oil pressure light on?
If the engine oil pressure warning light is on, the vehicle should not be driven. The engine may still start and appear to run normally, but assuming the sensor is faulty risks ignoring an actual engine oil pressure problem. Low oil pressure will will lead to catastrophic engine failure.
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