AutoZone 2003 Chevrolet Truck Blazer 4WD 4.3L SFI OHV 6cyl | Repair Guides | Engine Electrical | Sending Units And Sensors | Oil Pressure Sensor | AutoZone.com

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    Mercury Villager Nissan Quest 1997-2000

    Oil Pressure Sensor

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    The oil pressure sensor is located above the engine oil filter in the oil filter adapter.

    TESTING

    If the oil pressure warning lamp does not come on with the ignition switch in the RUN position and the engine OFF :

    1. With the ignition switch OFF , disconnect the oil pressure sensor wire.
    2.  
    3. Connect ohmmeter leads to the oil pressure sensor terminal and the negative battery terminal.
    4.  
    5. The resistance should be close to 0 ohms. If not, replace the sensor. If the resistance is above 10,000 (10k) ohms, further diagnosis and repair of the warning lamp circuit is indicated.
    6.  

    If the oil pressure warning lamp stays on with the engine running:

    1. Test the engine oil pressure. For oil pressure specifications, please refer to General Information and Maintenance, General Engine Specifications. If the oil pressure is not within specifications, further diagnosis and repair of the engine oiling system is indicated. Please refer to Engine and Engine Overhaul for more information. If the oil pressure is within specifications, proceed to step 2.
    2.  
    3. Turn the ignition switch to the RUN position without starting the engine.
    4.  
    5. Disconnect the oil pressure sensor wire.
    6.  
    7. Observe the oil pressure warning lamp. If the lamp goes out, the sensor is defective and should be replaced.
    8.  



    Click image to see an enlarged view

    Fig. Disconnecting the oil pressure sensor electrical connector

    REMOVAL & INSTALLATION

    CAUTION
    The EPA warns that prolonged contact with used engine oil may cause a number of skin disorders, including cancer! You should make every effort to minimize your exposure to used engine oil. Protective gloves should be worn when changing the oil. Wash your hands and any other exposed skin areas as soon as possible after exposure to used engine oil. Soap and water, or waterless hand cleaner should be used.

    1. Disconnect the oil pressure sensor wire.
    2.  
    3. Remove the sensor from the engine.
    4.  

    To install:

    1. Coat the new sensor with Teflon® tape or electrically conductive sealer.
    2.  
    3. Install the sensor.
    4.  
    5. Connect the oil pressure sensor wire.
    6.  
    7. Start the engine, allow it to reach operating temperature and check for leaks.
    8.  
    9. Check for proper oil pressure warning lamp operation.
    10.  



    Click image to see an enlarged view

    Fig. If the oil pressure sensor is leaking, like this one, it should be replaced

     
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