The oil pressure switch or sending unit is a unit that receives an electrical signal showing what your cars oil pressure is.And yes it does partially does let you know when there is a problem somewhere in the oil system.For example if your filter gets clogged up your oil pressure will go down and then go up when you accelerate.If there was a leak in the system first you would probably see the leak And if the oil pump or oil pump shaft were to break you would have no oil pressure.So you can see the importance of having an oil pressure switch.I feel there are 2 guages that are important to watch are your oil guage and water temp guage they can tell you allot about how your car is operating.
The oil pressure sending switch either runs oil pressure gauge or turns on light when oil pressure is low. On most cars the light won't come on if your oil is low unless it has a low oil light.
The oil pressure switch is simply a switch that determines if there is enough pressure in the engine. It is connected to the red oil light that goes on when the ignition is first turned on but the car hasn't been started, yet.
If the oil pressure switch or sending unit is detecting not enough oil pressure in the engine, then it will red flag the condition as indicated by the red light on the dash board's instrument panel.
If oil leaks from the engine, check around this sending unit, and also it could be leaking from a rubber seal or rubber or cork gasket around the oil drain pan, or from the valve cover gaskets.
Oil leaks on older engines can develop over time with use or high miles.
Usually, a light on the dash indicating low oil pressure can be caused by low oil level, or oil leaking out to cause this low pressure, or the oil pump in the engine's underside is worn out.
Engine damage can occur within seconds if this light is illuminated, and the engine continues to run as controlled by the driver of the vehicle.
Good luck on this repair.
To show oil pressure it will let you know when your oil is low as well light will flash
WHEN MY OIL PRESSURE IS LOW, I PULL OVER AND RUB ONE OUT !
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