Question about 1997 Lexus ES 300

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Installing an o2 sensor

How do i install this thing and where would i find it on the car

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  • james cyrus
    james cyrus Nov 22, 2008

    is it just screwed in or is it like soldered on there and will it be easy to get to and see?

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The O2 sensor goes in the exhaust pipe just below the exhaust manifold. That model may have an O2 sensor on each side of the engine, but they should be the only thing screwed into the exhaust pipe. And I would use TOYOTA brand parts or, if you have to replace it again,(and you probably would), you may have trouble getting it out.

Posted on Nov 22, 2008

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How to install 02 sensor for a 1999 chevy tahoe


unplug the electrical connector, then using a 7/8" wrench or O2 sensor socket turn the sensor counter clockwise to remove. sometimes you have to use a torch and heat the area around it to loosen the sensor. be aware sometimes the threads pull out of the exhaust that will have to be repaired to install new O2.

Sep 05, 2014 | Cars & Trucks

1 Answer

What does a o2 sensor look like


Heated Oxygen Sensor

Print


Removal & Installation

3.5L

WARNING When disconnecting the sensor electrical connector, do not pull directly on wire going into sensor.

  1. Disconnect the negative battery cable.
  2. Disconnect the heated oxygen sensor electrical connector.
  3. Use a socket such as a crowfoot wrench to remove oxygen sensor.

To Install:

NOTE When replacing an O2 Sensor, the PCM RAM memory must be cleared, either by disconnecting the PCM C-1 connector or momentarily disconnecting the Battery negative terminal. The NGC learns the characteristics of each O2 heater element and these old values should be cleared when installing a new O2 sensor. The customer may experience driveability issues if this is not performed.
  1. After removing the sensor, the threads must be cleaned with an 18 mm X 1.5 + 6E tap. If reusing the original sensor, coat the sensor threads with an anti-seize compound such as Loctite 771- 64 or equivalent. New sensors have compound on the threads and do not require an additional coating. Tighten the sensor to 28 Nm (20 ft. lbs.) torque.
  2. Connect the heated oxygen sensor electrical connector.
  3. Install the wiring clip to the heat shield.
  4. Connect the negative battery cable.

    0996b43f80202384.jpg enlarge_icon.gifenlarge_tooltip.gif

    Fig.


3.8L Downstream Sensor

WARNING When disconnecting the sensor electrical connector, do not pull directly on wire going into sensor.
  1. Disconnect negative battery cable.
  2. Raise and support vehicle.
  3. Disconnect the electrical connector.
  4. Use a socket such as a crowfoot wrench to remove oxygen sensor.

3.8L Upstream & Downstream Sensors

NOTE When replacing an O2 Sensor, the PCM RAM memory must be cleared, either by disconnecting the PCM C-1 connector or momentarily disconnecting the Battery negative terminal. The NGC learns the characteristics of each O2 heater element and these old values should be cleared when installing a new O2 sensor. The customer may experience driveability issues if this is not performed.
  1. After removing the sensor, the threads must be cleaned with an 18 mm X 1.5 + 6E tap. If reusing the original sensor, coat the sensor threads with an anti-seize compound such as Loctite 771- 64 or equivalent. New sensors have compound on the threads and do not require an additional coating. Tighten the sensor to 28 Nm (20 ft. lbs.) torque.
  2. Connect the heated oxygen sensor electrical connector.
  3. Connect the negative battery cable.

3.8L Upstream Sensor

WARNING When disconnecting the sensor electrical connector, do not pull directly on wire going into sensor.
  1. Disconnect negative battery cable.
  2. Disconnect the upper O2 sensor connector.
  3. Use a socket such as a crowfoot wrench to remove oxygen sensor.

    0996b43f80202385.jpg enlarge_icon.gifenlarge_tooltip.gif

    Fig.


    0996b43f80202386.jpg enlarge_icon.gifenlarge_tooltip.gif

    Fig.


To Install:


Testing


NOTE Allow the O2 Sensor to cool down before conducting the test. The O2 Sensor voltage should stabilize at 5.0 volts. Raising the hood may help in reducing under hood temps quicker.

  1. Turn the ignition on, engine not running. With the scan tool, actuate the O2 Heater Test.
  2. With the scan tool, monitor O2 Sensor voltage for at least 2 minutes. Does the O2 Sensor voltage stay above 4.5 volts- If so, sensor is normal.
  3. If voltage does not stay above 4.5v as indicated, check wiring and connectors. Check O2 sensor for contamination.
  4. If wiring from the O2 sensor is damaged, DO NOT repair it; replace the O2 sensor.
  5. Turn the ignition off. Allow the O2 sensor to cool down to room temperature.
  6. Disconnect the O2 Sensor harness connector.
  7. Measure the resistance across the O2 Sensor Heater element component side. Resistance for either O2 Sensor should be 2.1-2.7 ohms.
  8. If the O2 Sensor is not within range, turn the ignition off.
  9. Disconnect the O2 Sensor harness connector. Turn the ignition to ON; engine not running.
  10. With the proper scan tool, actuate the O2 Heater Test.
  11. Using a 12-volt test light connected to ground, probe the O2 Heater Control circuit in the O2 Sensor harness connector.
  12. If the test light illuminates brightly and flashes on and off, replace the O2 Sensor.
  13. Confirm the repair with the appropriate Verification Test.
  14. Turn the ignition off.
  15. Disconnect the O2 Sensor harness connector.
  16. Disconnect the PCM harness connector.
  17. Measure the resistance between ground and the O2 Heater Control circuit in the O2 Sensor harness connector.
  18. Is the resistance below 5.0 ohms- If yes, repair the short to ground in the O2 Sensor Heater Control circuit. If resistance is okay, go to step 20.
  19. Confirm the repair.
  20. If resistance was okay when measured in step 17, check the PCM harness connector terminals for corrosion, damage, or terminal push out. Repair as necessary.
  21. If the resistance is still not within specified range, replace and program the Powertrain Control Module in accordance with the service information.
  22. Confirm the repair.

Jul 13, 2012 | 2004 Chrysler Pacifica

1 Answer

I need to know what the code for a 1993 honda accord it flashed 4 slow then three short fast flashes, my car has been lagging really bad and i dont know exactly what i need to do to fix it i was told it is...


Found this for you on the web. Good luck.

c/p;

What is code 43?

Code 43 is "fuel supply system."

This code will trip when the ECU and the readings from the o2 sensor don't get along(in layman's term or easy enough for Si Speed to understand biggrin.gif) read the above two threads).

How to diagnose and fix?

First things first, when was the last time you changed your O2 sensor? Start by replacing that first because most likely, that's the main culprit. Now, you may wonder why doesn't the CEL indicate code 41(heated o2 sensor)? Usually when the o2 sensor is completely dead, that code will trip. Also, even though the o2 sensor is working, the voltage or ground isn't 100% Because of that, it will correlate with code 43.

If replacing the o2 sensor did not help code 43 to disappear, next thing is to replace your fuel filter. A clogged fuel filter will also trip code 43.

Next up, did you install an aftermarket Fuel Pressure Regulator? I have a few friends with 3rd gen Preludes and both of them installed aftermarket FPR's and they too, trip code 43. Him and a lot of people who install aftermarket FPR's mess with the PSI and that will cause code 43 to appear(on a stock ECU mind you). Bring it back to stock PSI to help fight code 43.

Those are the 3 main culprits that will cause code 43 from my experiences. Injectors, spark plugs & wires, most likely anything "fuel' related that isn't working properly will also cause code 43.

May 03, 2011 | 1993 Honda Accord

1 Answer

Code reading p0420 on '99 chevy s10 blazer, low catalyst threshold. Is this a bad catalytic converter or burned valves?


there are a couple of things to consider here. That code indicates that the O2 sensor behind the cat is not functioning like the engine computer expects-either the cat itself is not functioning properly or you may have an exhaust leak, or the heater circuit in the O2 sensor is faulty. The cat should get up to 600 degrees and it burns unburned fuel before ti gets to the 2ed O2 sensor-if it cannot do this, the CEL comes on and you have a P0420. Before replacing the cat, clear the code and see if it comes back-if it does, you might try first replacing the O2 sensor. If that doesn't work, get a 'oil fouler' spark plug adapter and install the O2 sensor in it, then install both into the exhaust-this 'shields' the tip of the O2 sensor and slows it down, fooling the engine computer into seeing it switching slowly, as it is supposed to do. Your only other choice is to replace the cat, and an aftermarket cat is much less than an OEM unit.

By the way, if you have burnt valves, a P0420 is the least of your worries.

Apr 01, 2011 | 1999 Chevrolet Blazer

1 Answer

Would like to know how to install a Bosch Universal O2 sensor #15726. did not get any installation instructions in the box. I would like to know which wire to connect the black wire to and which wires to...


You do not install a UNIVERSAL O2 Sensor

You install a Bosch OEM Sensors

Why would you even buy such a thing?

Go to NAPA, buy the correct sensor,
screw it in,plug in the connector,your done

Feb 18, 2011 | Nissan Altima Cars & Trucks

2 Answers

1989 Honda Prelude Si 4WS; 2.0 DOHC - How do I change the O2 sensors on the manifold?


simply unplug and use a 7/8 wrench and a lot of muscle use a small amount of anti seize during installation.

Feb 18, 2011 | 1989 Honda Prelude

1 Answer

Need help with installation of passenger side o2 sensor. I cannot get old sensor out and then of course new one in due to firewall. Any thoughts?


You can try this, first soak the base of the O2 sensor with WD-40 or some penetrating oil, and since you do not need the old O2 sensor, cut the wire connector off of the end and slip a 7/8" box end wrench onto the O2 sensor, and do be sure to use the box end of the wrench to loosen the O2 sensor and it should come loose.

Install the new O2 sensor with the open end of the 7/8" wrench, and do not over-tighten the O2 sensor.

Jun 10, 2010 | 1999 Ford Explorer

1 Answer

How do you replace the oxygen sensors in a 2001 nissan altima?


REMOVAL & INSTALLATION
  1. Start the engine and allow it to reach normal operating temperature, then turn the ignition switch OFF.
  2. Disconnect the negative battery cable.
  3. Open the hood and locate the Oxygen (O2S) sensor 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 O2S sensor.
  4. Disengage the O2S sensor pigtail connector from the vehicle harness connector. NOTE: There are generally 2 methods used to mount an O2S sensor in the exhaust system: either the O2S sensor is threaded directly into the exhaust component (screw-in type) or the O2S sensor is retained by a flange and 2 nuts or bolts (flange type). WARNING
    To prevent damaging a screw-in type O2S sensor, 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. O2S sensor tips are very sensitive and may be easily damaged if allowed to strike or come in contact with other objects.
  5. Remove the sensor, as follows:
    • Screw-in type sensors — O2S sensors are usually designed with a permanently attached wiring pigtail. This allows the wiring harness and sensor connectors to be positioned away from the hot exhaust system. 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.
  6. 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:
  7. Install the sensor, as follows: NOTE: A special anti-seize compound is used on most screw-in type O2S sensor threads, and is designed to ease O2S sensor removal. New sensors usually have the compound already applied to the threads. However, if installing the old O2S sensor 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 O2S sensor 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.
  8. Reattach the sensor pigtail connector to the vehicle harness connector.
  9. Lower the vehicle.
  10. Connect the negative battery cable.
  11. Start the engine and ensure no Diagnostic Trouble Codes (DTC's) are set.

Fig. 1: Since sensor locations vary between vehicles, the first step in removal is to locate the O2S sensors (arrows)...

bb4d603.jpg
    Fig. 2: ... and the sensor connector (2), which is usually near the O2S sensor (1), but removed enough from the heat of the exhaust system
    5048c2d.jpg
    Fig. 3: Disengage the sensor pigtail connector half from the vehicle harness connector half
    a1433b0.jpg

Oct 01, 2009 | 2001 Nissan Altima

2 Answers

Oxygen sensor


Get new O2 sensor. Jack car up off the ground, and safety block.

Allow exhaust system to cool.

Spray PB Blaster on O2 sensor.
Get O2 sensor socket, attach to wrench, grit teeth, and turn to loosen.

Install new O2 sensor.

Connect wiring.

Remove safety blocks, put car back on ground.

Jan 29, 2009 | 2004 Chevrolet Malibu

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