Oil light on solid - 2001 Nissan Altima

The trigger for the oil light is low oil pressure. That can relate to low oil level if the oil pump cannot pick up oil.

you have problem with your oil switch, or oil pressure. if you unplug the switch an the light goes. try replace the switch first.

get the OBD codes read and reset and see if there are any other codes that need looking at , then see if the warning lights come back on , then diagnose further so long vehicle is running OK, check the oil level at least

I myself use Valvoline.

Check the brake fluid level before you go any further ,that light signifies low brake fluid

It is located Above oil filter on back of engine. You have checked your oil level correct? Sorry just had to ask you would be surprised ..

The warning light means the engine oil pressure is low, not necessarily that the oil level is low.
The problem could be the pressure switch, or you really could have low oil pressure.
Driving the car with low oil pressure will damage the engine.

see if you have any oil level or pressure sensors. sometimes these can get gunked up. You may need a new oil pump. I suggest you start using a senthetic oil (valvoline,mobil 1 is reccomended) after u get the problem fixed.

you gotta pull the oil pan to get at it not too involved

Bought a very reputable diy service manual for the vehicle, and that plus a bit of thought and nous gave me the cure: no intrinsic problem other than loose relay connections. Went round with the wiring diagrams as guide checking all electrical connections in tight and relays fuses etc all good. Switched on and no problem any more.

By the way, vehicle is 1992 VW Polo - not Fox (which in UK is a variant of the Polo)