oil pressure guage reads 120 psi constantly

So when you turn the key on and don't start it the gauge reads 120? Also when you turn the key off it reads zero? If so that could be a bad oil pressure sending unit. Let me know so i can get you more info.

when the car is off the oil pressure gauge reads 0. When the key is turned on with the engine NOT running, the gauge reads 0. When the car is running, the gauge reads 120. I know it has oil pressure as the motor is smoothe and quiet.. I need to know what part is bad, where it is located on the car and if it is a fairly easy job. Thank you. Mike Ellis

The oil pressure sending unit is on the front of the engine bellow the power steering pump shouldn't be had to remove with a extension and oil sending socket. I cant tell you if its bad without testing the oil pressure to see how it compares to the readings.So gauge or sending unit is bad.

Thank you