Thanks a lot for your reply.
So this Oil Pressure Sender is actually the engine oil pressure sensor?
It has 4 cylinders, 2.4L. Thank you so much for the picture and tell me what I need.
The mechanic checked the engine oil, they said the engine oil is still good (level and color).
I bought this car early Sep. The seller told me to change the oil at 81K miles. Currently it has almost 80K miles. So next time if I need to change the filter, I should use the OEM one, like KIA/HYUNDAI or WIX?
Currently the light doesn't turn on. So can I leave it until next time it come on?