Engine Oil Pressure Check

Check engine oil level.
Remove the engine oil pressure switch (Refer to <<A>> ENGINE OIL PRESSURE SWITCH REMOVAL .
Install the engine oil pressure gauge.
NOTE: Use a 1/8 pipe thread adapter.
Run the engine to warm it.
After the engine has been warmed up, check that engine oil pressure is within the standard value.
Standard value:

At idle: 29 kPa (4.2 psi) or more

At 3, 500 r/min: 294 - 686 kPa (43 - 100 psi)

Fig 1: Identifying Engine Oil Pressure Switch And Cylinder Block (2.4L)
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
Remove the engine oil pressure gauge.
Install the engine oil pressure switch (Refer to >>A<< ENGINE OIL PRESSURE SWITCH INSTALLATION .

Fig 2: Identifying Engine Oil Pressure Switch And Oil Filter (3.8L)
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.