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Oil pressure light has almost nothing to do with with the amount of oil in the crankcase. Oil pressure is affected by just a couple things, does the oil pump work, is the pickup screen blocked, have the main and/or rod bearings worn out and does the pressure bypass still work? Rod and main bearings are quite simple, they consist of a hardened crankshaft with carefully turned and polished contact surfaces and rod and main bearings which fit tightly to the crankshaft with no more than two thousandths of an inch clearance when the bearings are new. The contact surface of the bearing is made of a very soft metal called "babbit". Oil pressur keeps the babbit bearing surface from actually coming in contact with the crankshaft surface. If the babbit has worn and the bearing surface has worn to the point that the clearance has significantly increased, the oil will leak past the bearings and the pump will not be able to pump enough oil volume to keep the pressure up. In short, low oil pressure is one of the main indicators that an engine is worn out.
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If the engine oil level is at the full mark, the light is not suppose to come on when driving.
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If the oil light only comes on when the engine is hot and on idle look at your oil pressure gauge to see if the needle is going down to the low end of the scale if so give it a service and make sure you use 10w 40oil reccomended for frontera and you can put in slick50 or other engine oil additive this will increase your oil pressure and stop the light coming on
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Low oil pressure. Bearing clearences are most likely to large. New or rebuilt engine time!
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If it it a change oil light it is telling you it is time to change the oil. There should be another light that is the oil pressure light.
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Low oil or a faulty oil level senser
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Low oil pressure of a faulty oil pressure sending unit.
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light diesel oil
What does it mean if the oil pressure warning light appears?
If the oil pressure warning light came on, it may mean that you have an oil leak. It can also mean that the sensor is bad.
