If the oil pressure sensor is malfunctioning, the problem is likely the sensor unit (click here for more). If the sensor does not fix the gauge, consider replacing the gauge set.
Part 15 in the diagram.
Year variations:
1991-92: HON-78150-SL0-003
1993-06: HON-78150-SL0-013 (discontinued)
1997-99: HON-78150-SL0-J01 (discontinued)
2000-01: HON-78150-SL0-A02
2002-05: HON-78150-SL0-A03
NSX Vintage Parts are sourced directly from Honda and Acura parts sources worldwide. ScienceofSpeed includes international import costs in the price of our products.