2013 GT low oil pressure at low RPMs or idle

2013 mustang GT I'm having low oil pressure at idle or low RPM. Give it some gas its fine. Only after the car warms up and I just changed the oil. No leaks and the oil level is fine. Im going to reset the computer tonight and see what happens heard about bad oil pumps but could just be a sensor. This car has always idled low around 500RPM. Any ideas?
 
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