There are a number of causes of this but the reason the light is coming on is because the PCM is seeing the oil pressure too low.
Here is a guide that talks about this:
https://www.2carpros.com/articles/high-or-low-engine-oil-pressure
The possible causes are low oil level, weak oil pump, or even a faulty sensor.
So here are guides that will help with this as I would suggest changing the oil and making sure it is clean and proper level.
https://www.2carpros.com/articles/how-to-change-engine-oil-and-filter
Next we need to hook a mechanical gauge to the engine and find out if it is truly low. If not then the sensor is the issue. If it is then we need to do more intrusive inspections of the engine.
Below is the process on how to do this. Please let us know if there are questions and what you find. Thanks
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Friday, July 2nd, 2021 AT 7:09 AM