O2 sensor and Oil pressure sending unit location

[chimpmunkproof]

Hey guys I was going to put on a Oxygen sensor extender in and was wondering where it is on my 2000 4 runner its the 4 cylinder version. I was also wondering where the oil pressure sending unit is located?
thanks a bunch

 

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this might help



REMOVAL & INSTALLATION
When troubleshooting a suspected oil pressure problem, it is possible to remove the electric oil pressure gauge sending unit (switch) and install a length of appropriate size oil line and a mechanical gauge. This is often the best way to determine if the instrument panel oil pressure gauge is faulty, the electric gauge sending has failed, or if the engine oil pump really is putting out only low pressure, endangering the engine.

If equipped, remove the lower engine splash shield.
Due to the shape of the switch body it may be necessary to use a specially-shaped socket. Toyota recommends their Special Service Tool (SST) 09816-33010 or an equivalent oil pressure switch socket. Using an appropriate socket extension, as required, remove the switch.

Fig. 1: A special socket is used to remove the switch

Fig. 2: Apply a thin coat of adhesive such as Loctite

 

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REMOVAL & INSTALLATION
Disconnect the negative battery cable.
Ensure that the engine and exhaust pipes are cold. Locate the oxygen sensor in question. There should be one in front of the catalytic converter and another behind the catalytic converter. Vehicles with dual front pipes will have four oxygen sensors, depending on the engine.
Some oxygen sensors thread into the pipe, others mount with two studs and nuts. Spray penetrating oil on the studs to ease removal.

Fig. 1: This O2 sensor is mounted with two studs and nuts. Use a penetrating oil to ease the removal of the mounting nuts

Fig. 2: Use a closed end wrench to remove the mounting nuts

Fig. 3: Unplug the O2 sensor harness

Fig. 4: It may be necessary to use a deep socket to remove the mounting nuts

Detach the oxygen sensor wiring.
Remove the oxygen sensor retaining nuts, if used, or with a suitable wrench, unscrew the sensor if it is the thread-mount type.
Remove the oxygen sensor and gasket.

Fig. 5: Remove the sensor from the pipe

Fig. 6: Remove the gasket from the studs . . .

Fig. 7: . . then discard the gasket and replace with a new one during installation

Fig. 8: Most Toyota oxygen sensors are of the four wire type

Fig. 9: Typical Toyota oxygen sensor wiring harness

To install:

Install the oxygen sensor with a new gasket. If a thread-type sensor, apply an even coat of anti-seize compound only to the threads. If a stud-mount type sensor, apply a coating of anti-seize compound to the mounting studs. Install the nuts and tighten to 14 ft. lbs. (20 Nm).
Connect the oxygen sensor wiring.
Connect the negative battery cable.