Liberty, Wrangler 2006-2007

Oil Pressure Sensor

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Removal & Installation



  1. Disconnect the negative cable from the battery.
  2.  
  3. Raise vehicle on hoist.
  4.  
  5. Remove front splash shield.
  6.  
  7. Disconnect oil pressure sender connector.
  8.  
  9. Remove the pressure sender.

    Click image to see an enlarged view

    Fig. Oil pressure sending unit

  10.  

To install:

  1. Install oil pressure sender.
  2.  
  3. Connect oil pressure sender wire.
  4.  
  5. Install front splash shield.
  6.  
  7. Lower vehicle.
  8.  
  9. Connect the negative battery cable.
  10.  

Testing



Low oil pressure (less than 10 psi) will close the switch, creating a circuit that includes the warning light. The light will go on when the switch is closed.

Disconnect the harness wire(s) from the sensor. Connect a jumper wire from the harness wire to ground on the engine (if single wire) or across the two harness wires.

Turn the ignition switch ON . The low oil pressure warning light should go ON. Disconnect the jumper. The light should go OFF. If the lamp does not light when the circuit is completed, suspect a burned out bulb or wiring problem.

With the engine OFF and oil pressure "zero", check for continuity across the switch body. On single-terminal switches, check continuity between the switch terminal and ground on the switch body or engine block. On two-terminal switches, check for continuity between the two terminals. In either case, there should be continuity. If not, replace the switch.

Click image to see an enlarged view

Fig. Oil pressure sensor location-3.7L engine

 
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