Oil pressure light flashing and beeps

Check the oil sensor and wiring connection to sensor

Oil light flashing is a sign of low oil pressure. Either you have an oil sending unit reading incorrectly, or you have an actual oil pressure issue. You need to get a mechanical gauge hooked to the engine and get an accurate reading. If you have good pressure with the mechanical gauge then all you need is a new sending unit. If you have low oil pressure with the gauge...the good new would be that you sending unit is fine. The bad news would be that your engine needs opened up, at the very least the pan needs to come off to see if the sump tube is blocked and not allowing oil to feed the pump. But could be as bad as worn bearings and the need for an overhaul or replacement engine.

the oil pressure sending unit may be not working or low on oil

always use a factory brand filter. this is because it has a check valve and cheap filters do not. oil light comes on if pressure is below 3 lbs. check accuracy with a mechanical gauge. could be a faulty sender

If it is your oil pressure warning light, the pressure sensor has probably failed these devices are more often at fault than the actual oil pressure. They aren't very expensive and take only minutes to replace.

The only way to tell for sure is to temporarily install a mechanical pressure gauge and read the actual pressure. That will determine the next course of action--replace the pressure sensor/switch, or recommend remedial action within the engine itself (worn bearings, worn oil pump, or plugged intake screen). Hope this helps!

Check that the oil level is full.If the oil has been in service for more than 4,000 miles, change it. Replace the oil pressure sending unit. If nothing changes, put a mechanical gauge on the engine and read actual oil pressure. Though "acceptable" low pressure is only 5lbs, I would never accept that as safe. Minimum pressure should be at least 20-25psi and normal running pressure between 35 to 45psi.
How low is "slightly low"?

DON'T DRIVE IT !!!! DON'T START IT AGAIN UNTIL YOU PUT A TEST GAUGE ON IT. you MUST have a gauge put on it to check for pressure. flashing and beep beep mean no pressure... not good. explain in detail how/when this happened ??

Have someone check the actual oil pressure with a mechanical gauge immediately. You may have an internal problem. This will also verify if you just need a new pressure sending unit.
good luck! hope this helps you.

This usually indicates that the oil pressure is low, but you need to get it checked out whether it's just a pressure sensor fault or connection issue, or it actually has got low oil pressure. The last one is the most concerning, because it could be causing internal damage if there is not enough oil pressure. Hopefully with a relatively late model car it will just be a sensor issue, but I would get it checked out ASAP, and preferably not use the car in the meantime.
Hope this helps, Mark.