how to check engine oil pressure switch?The oil pressure switch is installed in the oil circuit of the engine. It monitors the oil pressure and turns off or on a warning light or controls an oil pressure indicator. The oil pressure switch is normally closed. When the ignition is switched on, the oil pressure warning light illuminates.
The low oil pressure light is a warning that there's not enough oil pressure or that the oil level is too low. This prevents the oil from going through the narrow passages to provide sufficient lubrication. Lack of lubrication can cause the engine to seize up or cause damage beyond repair.
The most common reason a low oil pressure warning light is coming on is because of low oil level. It can also be caused by a faulty oil pump, pickup tube, clogged oil filter, or an internal oil leak. It may be a false alarm, caused by a bad oil pressure sensor or faulty wirings.
If you're driving along and your oil warning light comes on, take it very seriously. This indicates that your car may be unsafe to drive. Your auto's engine has lost oil pressure, or the oil level is too low. When the warning light comes on, pull over as soon as possible and shut off the engine.

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