Oil Level Sensor or Sender....?

I have no symptoms with my car besides that yellow oil light staying on after each start up for 10 seconds. I have read all the threads but can't find the answer to my question now. I'm about to do an oil change it was going to replace the oil level sensor. After reading a couple more threads I noticed people mentioning the oil level sender.



Now how can I diagnose it to figure out which one it would be? Can I...?





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