Question about 2000 Toyota Camry

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I want to change the Oxygen sensor (s) of my Toyota Camry 2000 but I don't know how many it has and were they are located. Do I need to have a special tool to take them out? Where in the internet do you recommend I should buy it. How do I know if my car is a California Spec or not? I ask this last question because I was told that this type of cars are California Spec and it has a different and more expensive Oxygen Sensor. Is it true??? Thanks for your time guys. Any help will be highly appreciated!!!!!

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  • Yampier Mar 27, 2011

    That website is useless as well. It is anything but helpful.



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The type of sensors you need in that state will be available from the service dealer spares or auto spares shops
as for the number there is one HO2S ( heated oxygen sensor ) in the exhaust manifold /pipe before the cat converter for each bank) and one o2 ( oxygen sensor) sensor after the cat converter for each bank
each type of sensor does a specific job and are not interchangable
it is best if you buy the correct socket tool to remove the sensors as the wires are delicate and are easily damaged while installing the new units

Posted on May 21, 2017


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If you look down at your exhaust manifold you will see a sensor sticking out that looks like a o2 sensor. It is not. Its an air fuel ratio sensor and it works totally different then a o2 sensor.THis is the sensor that helps adjust the air fuel mixture. If you follow the exhaust system back under the car about 1/2 way you will see another sensor in the exhaust . This is the o2 sensor and is used to monitor the condition of the convertor.
If you need one of these sensors you will have a check engine lite on with a AF or o2 code.

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SOURCE: replace oxygen sensor

REMOVAL & INSTALLATION Start the engine and allow it to reach normal operating temperature, then turn the ignition switch OFF. Disconnect the negative battery cable. Open the hood and locate the O2sensor connector. It may be necessary to raise and safely support the vehicle for access to the sensor and its connector. NOTE: On a few models, it may be necessary to remove the passenger seat and lift the carpeting in order to access the connector for a downstream O2sensor. Disengage the O2sensor pigtail connector from the vehicle harness connector. NOTE: There are generally 2 methods used to mount an O2sensor in the exhaust system. Either the O2sensor is threaded directly into the exhaust component (screw-in type) or the O2sensor is retained by a flange and 2 nuts or bolts (flange type). WARNING To prevent damaging a screw-in type O2sensor, if excessive force is needed to remove the sensor lubricate it with penetrating oil prior to removal. Also, be sure to protect the tip of the sensor; O2sensor tips are very sensitive and may be easily damaged if allowed to strike or come in contact with other objects. Remove the sensor, as follows: Screw-in type sensors: Since O2sensors are usually designed with a permanently-attached wiring pigtail, it may be necessary to use a socket or wrench that is designed specifically for this purpose. Before purchasing such a socket, be sure that you can't save some money by using a box end wrench for sensor removal. Flange type sensors: Loosen the hold-down nuts or bolts and pull the sensor out of the exhaust component. Be sure to remove and discard the old sensor gasket, if equipped. You will need a new gasket for installation. Perform a visual inspection of the sensor. Black sooty deposits may indicate a rich air/fuel mixture, brown deposits may indicate an oil consumption problem, and white gritty deposits may indicate an internal coolant leak. All of these conditions can destroy a new sensor if not corrected before installation. To install: Install the sensor, as follows: NOTE: A special anti-seize compound is used on most screw-in type O2sensor threads, and is designed to ease O2sensor removal. New sensors usually have the compound already applied to the threads. However, if installing the old O2sensor or the new sensor did not come with compound, apply a thin coating of electrically conductive anti-seize compound to the sensor threads. WARNING Be sure to prevent any of the anti-seize compound from coming in contact with the O2sensor tip. Also, take precautions to protect the sensor tip from physical damage during installation. Screw-in type sensors: Install the sensor in the mounting boss, then tighten it securely. Flange type sensors: Position a new sensor gasket on the exhaust component and insert the sensor. Tighten the hold-down fasteners securely and evenly. Reattach the sensor pigtail connector to the vehicle harness connector. Lower the vehicle. Connect the negative battery cable. Start the engine and ensure no Diagnostic Trouble Codes (DTC's) are set. Posting pictures next......

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