Oil preasure gadge going up and down

Hello,

Are you experiencing any drivability issues? Any noise from the engine?

If the engine drives as usual and has no other issues, this could be due to a faulty oil pressure sensor, loose or corroded wiring or a bad gauge.

Inspect the pressure sensor, make sure the wiring is secured and does not have any corrosion or pulled out pin.

https://www.2carpros.com/articles/high-or-low-engine-oil-pressure

I have attached diagrams for your reference.

Please let me know if you have any questions.
Thank you.