Question about 1994 Jeep Cherokee Country

1 Answer

Oxygen sensor I would like to test the O2 sensors. It has a 4.0 engine.

Posted by on

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Top Expert:

    An expert who has finished #1 on the weekly Top 10 Fixya Experts Leaderboard.

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

  • Jeep Master
  • 61,272 Answers

O2 voltage should vary between about .10 volts and 1.0 volts with the engine in closed loop mode. low volts mean lean, high, rich, if the voltage is always low (<.20V) even when you goose the throttle chances are the O2 is done. Remember high/low voltage readings indicate lean rich conditions, a failed O2 has almost no drive symptom, just a check engine light.

Posted on Aug 27, 2008

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

3 Answers

How do i replace an oxygen sensor on 1993 cadillac deville


Re: Replacing O2 sensor - Cadillac Forums

www.cadillacforums.com > ... > Past Cadillac Vehicle Discussion

Dec 28, 2009 - 14 posts - ‎3 authors
Hi guys, my wife has a 99 Deville with the 4.6L Northstar engine. ... I used the search function for "oxygen sensors" but I received a ton of ... 1985-1992 Fleetwood, 1993Sixty Special, All FWD Forum Discussion, Replacing O2 ... Re: 1992 Deville O2 sensor location
4 posts
Dec 21, 2013
2003 Deville Oxygen (O2) Sensor Replacement
8 posts
Sep 4, 2013
Re: 93 Deville Oxygen Sensor
4 posts
Feb 1, 2010
Re: Looking for O2 sensor: Bank 1 Sensor 1
15 posts
May 6, 2009
More results from www.cadillacforums.com

Cadillac Seville post cat O2 sensor routing - YouTube

? 0:18
https://www.youtube.com/watch?v=OgduuUfKeao
Dec 1, 2009 - Uploaded by edsts2000
Video clip of the metal channel that Cadillac put in the 2000Seville ... To Install Replace Rear Downstream ...

How to Change an Oxygen Sensor - YouTube

? 3:28
https://www.youtube.com/watch?v=LFR8Numjy7M
Sep 16, 2008 - Uploaded by OrchEnt
How to Change an Oxygen Sensor. ... How to Check andReplace an Oxygen Sensor (Air Fuel Ratio Sensor ...

Cadillac DeVille Oxygen Sensor - PartsGeek.com




Jan 19, 2016 | 1993 Cadillac DeVille

Tip

How to Test the O2 Sensor of Bentley Arnage car?


O2 sensor needs to be replaced when you get low gas mileage in car.
So before replacing the sensor it needs to be tested.
The procedure to test O2 sensor is as follows: ---
1) First drive the vehicle for 15 minutes in normal temperature.
2) Then Stop the vehicle in park mode and turn the engine off.
3) You will see primary O2 sensor on the exhaust manifold, the manifold will be very hot to touch so take care.
4) The function of O2 sensor in the car is to measure the amount of oxygen in car and then send that information to engine to adjust fuel pressure.
5) Now to measure the O2 sensor reading. Carefully disconnect the wire at the O2 connector, and hook the positive lead of volt meter to the O2 sensor side of the connector and connect the positive lead of volt meter to harness side of the connector.
6) In the O2 sensor you will notice two black wires that are not used for testing.
7) Now before beginning the important part of the testing procedure, check out properly that wires of O2 sensor and wires of volt meter are not getting touch to any other metal part or the manifold.
8) After checked and confirmed. Now start the car and see the voltage in engine idle position.
9) The reading will go high or go low but the average reading that it should show is 500 mV.
10) Now let the engine run and with engine running disconnect the fuel pressure regulator vacuum hose, and plug the hose with your finger.
11) The 500 mV reading will go to 700-800 mV.now remove the finger the reading will fall low to 300 mV.
12) But if these readings are not showing properly that indicates the fault in the sensor.
13) The secondary O2 sensor is located after the catalytic converter. The procedure to measure secondary O2 sensor is exactly the same like how you measured the primary O2 sensor.
14) The secondary oxygen sensor is located under the car.
15) Put the car on jack stands on the rack, this will give you proper sensor location in the car.
16) You can test secondary O2 sensor to conform the fault before replacing the O2 sensor.
17) The cost of replacing the O2 sensor is near to $100.This cost is for if you do it yourself.
This will help. Thanks.

on Mar 22, 2010 | Bentley Arnage Cars & Trucks

Tip

How to Test the O2 Sensor of Cadillac Devile car?


O2 sensor needs to be replaced when you get low gas mileage in car.
So before replacing the sensor it needs to be tested.
The procedure to test O2 sensor is as follows: ---
1) First drive the vehicle for 15 minutes in normal temperature.
2) Then Stop the vehicle in park mode and turn the engine off.
3) You will see primary O2 sensor on the exhaust manifold, the manifold will be very hot to touch so take care.
4) The function of O2 sensor in the car is to measure the amount of oxygen in car and then send that information to engine to adjust fuel pressure.
5) Now to measure the O2 sensor reading. Carefully disconnect the wire at the O2 connector, and hook the positive lead of volt meter to the O2 sensor side of the connector and connect the positive lead of volt meter to harness side of the connector.
6) In the O2 sensor you will notice two black wires that are not used for testing.
7) Now before beginning the important part of the testing procedure, check out properly that wires of O2 sensor and wires of volt meter are not getting touch to any other metal part or the manifold.
8) After checked and confirmed. Now start the car and see the voltage in engine idle position.
9) The reading will go high or go low but the average reading that it should show is 500 mV.
10) Now let the engine run and with engine running disconnect the fuel pressure regulator vacuum hose, and plug the hose with your finger.
11) The 500 mV reading will go to 700-800 mV.now remove the finger the reading will fall low to 300 mV.
12) But if these readings are not showing properly that indicates the fault in the sensor.
13) The secondary O2 sensor is located after the catalytic converter. The procedure to measure secondary O2 sensor is exactly the same like how you measured the primary O2 sensor.
14) The secondary oxygen sensor is located under the car.
15) Put the car on jack stands on the rack, this will give you proper sensor location in the car.
16) You can test secondary O2 sensor to conform the fault before replacing the O2 sensor.
17) The cost of replacing the O2 sensor is near to $100.This cost is for if you do it yourself.
This will help. Thanks.

on Mar 22, 2010 | Cadillac DeVille Cars & Trucks

1 Answer

Got Honda accord 2000 code po135 replaced 02 sensor and stil show same code



How to Diagnose a P0135 -Heater
Performance Bank 1 Sensor 1 (GM 3.5L)
January 31, 2012 Updated: October 29, 2014 Written by: Abraham Torres-Arredondo Article Id: 371

image_1.gifIf your check engine light is on and you have a diagnostic trouble code P0135 stored in the PCM's memory... then you've come to the right place to test and troubleshoot the upstream oxygen sensor.
A P0135 DTC says: HO2S Heater Performance Bank 1 Sensor 1... and this means that the PCM (Powertrain Control Module = Fuel Injection Computer) has detected a problem with the front oxygen sensor's heater element or a problem in the heater's circuit (wires).
In this tutorial, I'll show you how to check the oxygen (O2) sensor's heater element and the two circuits that feed it with power (10 to 12 Volts) and ground with a multimeter.
In case you're wondering, where the oxygen (O2) sensor that the code P0135 is accusing of being BAD is... this bad boy is located on the exhaust manifold and before the catalytic converter.
To help you navigate this article, here are its main points:
  1. Symptoms of a BAD Oxygen Sensor Heater Element.
  2. What Tools Do I Need to Test Code P0135?
  3. What Does the Heater Inside the Oxygen Sensor Do?
  4. Circuit Descriptions of the Downstream Oxygen Sensor.
  5. Start Here.
  6. TEST 1: Oxygen Sensor Bank 1 Sensor 1 Test.
  7. TEST 2: Checking 12 Volts to O2 Heater.
  8. TEST 3: Checking the O2 Heater's Ground Circuit.
  9. TEST 4: Ohming the O2 Heater Element.
  10. P0135 O2 Sensor Heater Test Summary.
Buying a Digital Multimeter for Automotive Diagnostic Testing (found at: easyautodiagnostics.com).
  • Scan Tool.
    1. Don't have one?... check out my recommendation: Abe's Scan Tool Recommendation.
  • Wire Piercing Probe.
    1. Although this tool is not an absolute must, if you do buy one, you'll realize just how easy it makes testing the voltages inside the wires.
    2. If you need to see what this tool looks like, you can see it here:Wire Piercing Probe.
  • < Prev
  • 1
  • 2
  • 3
  • 4
  • Next >

  • Applies To:
    back-25.png forward-25.png
    Buick Vehicles:
    • Rainier 4.2L
      • 2004, 2005
    Chevrolet Vehicles:
    • Colorado 3.5L
      • 2004, 2005
    • Trailblazer
      • 2004, 2005
    3.5L image_thumb_home_page_1.jpg
    How To Test for a Blown Head Gasket (GM 3.5L, 4.2L)
    How to Test the MAF Sensor and Codes: P0100, P0101, P0102, P0103
    How To Test for a Blown Head Gasket (GM 3.5L -FWD)
    All Articles: 3.5L "A day without sunshine is like, you know, night"
    Steve Martin
    MORE TUTORIALS:
    image_thumb_home_page_1.jpg

    Feb 03, 2015 | 2000 Honda Accord

    3 Answers

    Is p0052 a fuse problem or a o 2 sensor


    P0052 DTC trouble code may be caused by one or more of the following:
    A short in the heater circuit in the sensor.
    A failed O2 sensor heater.
    Wiring/connectors broken/frayed leading to sensor and/or relay.
    Failed PCM/ECM.

    Jan 01, 2015 | Cars & Trucks

    Tip

    How to Test the O2 Sensor of Acura Integra car?


    O2 sensor needs to be replaced when you get low gas mileage in car.
    So before replacing the sensor it needs to be tested.
    The procedure to test O2 sensor is as follows: ---
    1) First drive the vehicle for 15 minutes in normal temperature.
    2) Then Stop the vehicle in park mode and turn the engine off.
    3) You will see primary O2 sensor on the exhaust manifold, the manifold will be very hot to touch so take care.
    4) The function of O2 sensor in the car is to measure the amount of oxygen in car and then send that information to engine to adjust fuel pressure.
    5) Now to measure the O2 sensor reading. Carefully disconnect the wire at the O2 connector, and hook the positive lead of volt meter to the O2 sensor side of the connector and connect the positive lead of volt meter to harness side of the connector.
    6) In the O2 sensor you will notice two black wires that are not used for testing.
    7) Now before beginning the important part of the testing procedure, check out properly that wires of O2 sensor and wires of volt meter are not getting touch to any other metal part or the manifold.
    8) After checked and confirmed. Now start the car and see the voltage in engine idle position.
    9) The reading will go high or go low but the average reading that it should show is 500 mV.
    10) Now let the engine run and with engine running disconnect the fuel pressure regulator vacuum hose, and plug the hose with your finger.
    11) The 500 mV reading will go to 700-800 mV.now remove the finger the reading will fall low to 300 mV.
    12) But if these readings are not showing properly that indicates the fault in the sensor.
    13) The secondary O2 sensor is located after the catalytic converter. The procedure to measure secondary O2 sensor is exactly the same like how you measured the primary O2 sensor.
    14) The secondary oxygen sensor is located under the car.
    15) Put the car on jack stands on the rack, this will give you proper sensor location in the car.
    16) You can test secondary O2 sensor to conform the fault before replacing the O2 sensor.
    17) The cost of replacing the O2 sensor is near to $100.This cost is for if you do it yourself.
    This will help. Thanks.

    on Mar 22, 2010 | Acura Integra Cars & Trucks

    1 Answer

    How many o2 sensors are on a 1999 Silverado 5.3


    The 1999 5.3 V8 engine had 4 oxygen sensors. There are two catalytic converters on this engine, one on the driver side of the engine, and one on the passenger side of the engine. This is important to know, as the number of oxygen sensors is directly related to the number of catalytic converters on the vehicle. Driver side is referred to as Bank 1, passenger side is referred to as Bank 2. This is very important to know when looking up replacement oxygen sensors. There is one oxygen sensor in front of, or before the catalytic converter, usually referred to as a pre-catalyst O2 sensor. There is also one behind, or after the catalytic converter, usually referred to as a post-catalyst oxygen sensor. So, you have two oxygen sensors on Bank 1, and two oxygen sensors on Bank 2, for a grand total of 4 oxygen sensors.

    Oct 03, 2013 | 1999 BMW 318 ti

    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

    Oxygen sensor replacement


    It's something you can with simple tools, you have four O2 sensors. Your going to have to get the truck rescanned or if you have the DTC code, you can find out which O2 sensor has gone bad so you can replace it. Your going to have Two upstream O2 sensors on each exhaust bank, one O2 sensor before the Catalytic Converter, and the last one after the Catalytic Converter. Its like replacing a Spark plug and you can pick up the O2 sensor at any large Auto Parts store with a can of WD 40. Just unclip the wire leads to the O2 sensor and then with a O2 sensor socket or hint close end wrench and hammer, you can remove the O2 sensor from the exhaust pipe. Good luck and be safe.

    Nov 22, 2009 | 2004 Chevrolet Silverado 2500HD

    1 Answer

    Where is the oxygen sensor located?


    WHICH ENGINE YOU GOT?... V6 OR 4 CYLINDER?
    On the V6 there are four (4) oxygen sensors (O2 Snsr), and on the 4 cylinder there are two (2) O2 Snsrs. The Upstream O2 sensors are in the exhaust manifolds at the top, and the downstream O2 sensors are at the bottom of it or in the exhaust pipe.

    Oct 06, 2009 | 2003 Hyundai Tiburon

    Not finding what you are looking for?
    1994 Jeep Cherokee Country Logo

    Related Topics:

    156 people viewed this question

    Ask a Question

    Usually answered in minutes!

    Top Jeep Experts

    yadayada
    yadayada

    Level 3 Expert

    61249 Answers

    Colin Stickland
    Colin Stickland

    Level 3 Expert

    21949 Answers

    Jeff Turcotte
    Jeff Turcotte

    Level 3 Expert

    6812 Answers

    Are you a Jeep Expert? Answer questions, earn points and help others

    Answer questions

    Manuals & User Guides

    Loading...