The low oil pressure/check gauges warning lamp (fed by the oil pressure sending unit) will illuminate when the ignition key is turned to the ON position without. If so, check the operation of the oil pressure switch. Use a digital multimeter set to ohms. The switch may be normally open but is most often normally closed. The oil pressure sensor, often referred to as the oil pressure sender, is a unit responsible for telling a vehicle's computer the oil pressure. It controls the gauge on.
An oil sending unit, also called an oil pressure sensor or switch, controls the oil indicator light or gauge in a vehicle. The indicator tells the driver of any problems . The oil pressure sensor on my perkins always reads the same (about 65psi if I recall correctly), irrespective of load, hours run etc. Below are the most typical symptoms of a faulty oil pressure switch or sensor: Repeated Testing the Oil Pressure Gauge-(Oil Pressure Troubleshooting).
The oil pressure gauge inside your car will give you a good indication as to the condition of the engine's oil levels. If the Low Oil Light comes on, but you check. Now attach the oil pressure gauge to the adaptor and check the engine oil level before starting the vehicle and allowing it to reach operating temperature.