Yes,if the sending unit is the source of the leak.
If the oil sending unit is leaking oil by the inside of the component, then I don't know of any way to fix that other than removal and replace with another one. If it is leaking by the threads, then you can try teflon tape to seal that. Also make sure it is leaking from the sending unit and not leaking down from the valve cover.
It can be the sending unit is leaking or it can be a a leaking oil filter, oil drain plug, rear main seal, valve cover gasket, or any number of other leaks. Inspect the engine and find the source of the leak.
because it is no good, replace it! Leaking at the threads or the unit is defective.
If it is leaking it is bad. Otherwise you just replace it if you suspect it to be defective.
That sounds like the knock sensor but I don't see that leaking oil. Could the oil be coming from the rear corner of the intake or valve cover or head gasket?
To test the oil sending unit on a 2005 Nissan Titan, first ensure the engine is off and disconnect the electrical connector from the sending unit. Use a multimeter to measure the resistance between the terminal of the sending unit and the ground; it should change as you manipulate the oil pressure (by cranking the engine). If the resistance does not change or if the sending unit is leaking oil, it may need to be replaced. Additionally, you can verify functionality by replacing it temporarily with a known good unit to see if the oil pressure gauge responds correctly.
Probably you need to replace the oil pressure sending unit. It is located on the engine down close to the oil pan. If the sending unit is leaking oil then replace it by all means. Doubtful that the oil pump is defective.
There is a heater hose that goes in the left rear back side of the intake manifold that hooks to a quick disconnect fitting, It is common for the fitting to leak antifreeze. If it is oil that is leaking, then there is a oil sending unit to the right of the distributor that could be leaking oil. There is a long rubber gasket that seals the back of the intake manifold to keep it from leaking oil also. That's all that could be leaking back there. GOOD LUCK.
Perhaps leaking valve cover gasket? Perhaps leaking oil sending unit?
Low oil pressure, or the oil pressure sending unit is defective. If the oil level is full, then the oil pump is weak or the sending unit is bad. Replace the oil pressure sending unit and see if that solves the problem. If not, seek professional help. Do not continue to drive the car in this condition.
The OIL SENDING UNIT is the device than senses oil pressure in the passage after the oil pump. The oil pump sucks oil from the oil pan and sends it under high pressure through the passage to the engine components. If the Oil Sending Unit or oil pressure sensor develops a leak it (ie... its leaking) it should be replaced asap. It will leak oil at an undetermined rate, depending upon how bad it becomes, you need to judge when to replace it. For the cost of having a professional install it it's nothing compared to the cost of an engine failure. Proceed with caution.