Question about 1994 Isuzu Pickup

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How Do I get the o2 light to go off after installing the new o2 sensor?

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After replacing the sensor, perform the following procedure to reset the lamp.


  • Remove instrument cluster.
  • Remove masking tape from hole B .
  • Remove screw from hole A and install into hole B .
  • Apply new masking tape to hole B .
  • Install instrument cluster.

Posted on Oct 02, 2009

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LS model?? base model???the instrument cluster will need to be removed, flip it over looking at it from the back there is the speedometer outlet, to the left at approx 7 o 'clock will be a screw, maybe marked "KSW" take that screw out ( the o2 light should go out. if you want it to come back on another 90k miles from now then put in the hole that should be covered with a piece of tape approx 4 oclock and also marked "KSW") if you never want to see that light on again, then throw the screw away.

Posted on Sep 25, 2009

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A scan tool or disconnect the battery for 10 mins

Posted on Sep 25, 2009

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Posted on Jan 02, 2017

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SOURCE: check engine light is on

no just drive it normal, it can take quite awhile for the light to go off unless you have someone clear the code for you..

Posted on Aug 20, 2010

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1 Answer

2007 tahoe o2 sensor, installed new o2 sensor but engine light stays on. code says bad


which sensor was replaced
there are 2 sensors involved
one after the cat converter and one in the exhaust manifold /pipe before the cat converter
the code will read the same for both

Apr 01, 2017 | 2007 Chevrolet Tahoe

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I have a 2000 Mazda Protege EX, 1.6 L, manual transmission. Car was driving normal but hesitating and Engine light came in. Checked MAF hose & is not cracked, changed spark plugs & coil, but light...


Many o2 sensors have gone bad but 50% of the time when a code is set on a car about an o2 sensor there is another cause which is changing the emissions & setting the o2 code (ex. vacuum leak, bad plug, injector, it could very well be the cat etc.) The root cause of the problem must be found NOT JUST READING CODES! TAKE YOUR CAR ELSWHERE.

Apr 07, 2017 | Jaguar XJ8 Cars & Trucks

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Upstream heated O2 sensor heater fault


check the fuses if the fuse blew the heated side of the sensor will not work and still kick the code also a v-6 has 2 upstream o2 sensors

Oct 01, 2012 | 1997 Mercury Villager

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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

Failed inspection due to o2 sensor - check engine light


You need to get a new O2 sensor. You can change it yourself. Make sure engine is cold so you don't get burned. Unplug old sensor and unscrew. Install new sensor and plug in. You might need to get the code reset.

Jan 07, 2011 | 1998 Cadillac Catera

2 Answers

I installed new o2 senser and the light stays on -1992 trooper


Do you mean that the check engine light stays on after you installed a new O2 sensor?

Check for codes, again, and go from there.

Jul 11, 2010 | 1992 Isuzu Trooper

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

2 Answers

96 Dodge Neon O2 sensor Ckt No Activity bank 1 sensor 1----how do I replace the sensor, will that correct a problem with the check engine light?


That would correct the problem, the O2 sensor is on the exhaust manifold or on the exhaust manifold down pipe. If you go to Auto Zone, they will have the O2 sensor you need and also the loaner tool you may need to remove the O2 sensor. Auto Zone also can give you the step by step instructions to replacing the O2 sensor in about 30 min. Once you located the O2 sensor, disconnect the wire harness and use the O2 sensor socket to remove the sensor from the exhaust. It's like removing a spark plug, to install the new O2 sensor is just to follow the same procedure in revers to the removal. Good luck.

Oct 28, 2009 | 1996 Dodge Neon

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)...

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    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

1 Answer

Installed new 02 sensor ,light is on again. what


did you replace both (2) O2 sensors? if you have two cats. you should have two sensors. check again.

Mar 13, 2009 | 1996 Lincoln Town Car

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