Oil Pressure Check

WARNING: This page is about a different car, the 2008 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.

WARNING:

Be careful not to burn yourself, as engine oil may be hot.
For CVT models, put the selector lever in the Park "P" position.

Check the oil level.
Disconnect oil pressure switch harness connector.
Remove oil pressure sensor.
Install the pressure gauge.

Fig 1: Identifying Oil Pressure Gauge
Courtesy of NISSAN MOTOR CO., U.S.A.
Start the engine and warm it up to normal operating temperature.

Check oil pressure with engine running under no-load, using Tool

Tool numbers

:ST25051001 (J-25695-1)

: ST25052000 (J-25695-2)

ENGINE SPEED SPECIFICATION

Engine speed rpm	Approximate discharge pressure kPa (kg/cm² , psi)
Idle speed	More than 98 (1.0, 14)
2,000	294 (3.0, 43)

If difference is extreme, check oil passage and oil pump for oil leaks .

After the inspections, install the oil pressure switch as follows:
1. Remove the old sealant adhering to switch and engine.
2. Apply thread sealant and tighten the oil pressure switch to specification.
  Use Genuine High Performance Thread Sealant, or equivalent . Refer to "RECOMMENDED CHEMICAL PRODUCTS AND SEALANTS ".
  
  Oil pressure switch: 14.7 N.m (1.5 kg-m, 11 ft-lb)