I have a 1995 olds aurora with a northstar. The oil level is fine but the computer says low oil pressure when at a stop light. Is this the oil sensor or oil pump?

IF THE PROBLEM STARTED AFTER THE OIL LEVEL SENSOR WAS BROKEN REPLACE IT.

Probably the sensor/sending unit on the engine that sends signal to the light.

Okay What it means is that the oil in your car is either low in level or the oil pressure at low revolutions is low. I highly recommend you to stop driving the car when this happen because you can internally damage the engine with a low oil or a low pressure of oil. Check the oil level first..make sure level is fine and oil looks good. Black and burned oil will give you a low oil pressure as well. If it happen that your car need a oil change. Make sure you get it done and see if the problem goes away. Very rarely oils pressure sensor goes bad but if oil is new and level is fine you can take the oil pressure sensor and connect a tester for a oil pressure. If this is not under the manufacturer specifications.. oil pump is worn out and you have to replace it for a new one.
Good luck and don't forget to rte me. Thanks

the oil light is coming on due to sensed low engine oil pressure, this is not a level issue unless u are about 3 quarts low, oil pressure indicators don't leave any computer codes, so who ever told u that is wrong, u need to test the oil pressure with a mechanical gage when the oil light is on, until U need to confirm that u don't have a real pressure issue here or you can burn out the engine bearings, if the pressure checks ok then rplace the oil pressure light sending unit in the engine.

Probably an oil pump, will it still do this if you rev the engine a little while stopped? If not then you have an oil pump that could be failing or hopefully it is the pressure sensor that is off. either way don't chance it

Your oil sensor may be faulty, or your may have a leak resulting in a low pressure tripping the sensor, or your oil level may not be where it's supposed to be

The oil pressure sending unit has gone bad. I sending unit is just above the oil filter and you can get to it from the top. When you face the Engine look down towards the oil filter, the oil pressure sending unit is just above that and it looks like a cylinder with two wires coming from it. If you don't see it, it's right between the exhaust manifold and oil filter.
If you go to Auto Zone or Parts Source, they'll have the oil pressure sending unit and the step by step instructions, When installing the new sensor. Do not use teflon tape or any sealant, the sensor is tapered and need's the good ground from the engine to give you right readings.
Good luck and hope this helps.

Open the DIS [Driver Information System] with the car running. The screen should flash all the annoying messages. Press the "Fuel" button repeatedly until the messages clear and it displays your fuel used. The press the Eng button until it shows your Oil Life, then hold down the reset button for 10 seconds. Then press Eng again till it shows your Transmission Fluid Life, and hold down the reset button for 10 seconds. As for the coolant indicator, make sure the reservoir is filled to the appropriate level. If you still get the Low Coolant message, check to make sure the coolant level sensor is plugged in (its on the reservoir) and if it is, then it may need replaced or cleaned.

left front bottom of engine....

Low pressure when at idle, after the engine has warmed up and the oil has thinned, indicates that the oil pump is worn and needs to be replaced.