Question about 2000 Chevrolet Blazer

2 Answers

Replacing oxygen sensor

How do you replace an oxygen sensor and can you test the sensor to see if you're replacing the correct one.

Posted by on

2 Answers

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Chevrolet Master
  • 17,970 Answers

If you have one or more O2, the right procedure is replace all this sensors; then, reset the ECU and any code refer to O2 must be appear. This the unique test.

Good luck.

Posted on Apr 26, 2010

  • 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.

  • Chevrolet Master
  • 75,744 Answers

The sensor can be tested but it requires a very expensive electronic system scanner, what code do u have, most O2 codes are not a fualty sensor but a problem in the fuel injection system, the sensor just reads the problem(s)

Posted on Apr 26, 2010

5 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

  • 97 Answers

SOURCE: Failed Smog test - suspect Oxygen Sensor as NO levels really high

ok its were the air pipe is on the car were the air filter goes it plugs in. you can do it easily your self at home in your drive way.
yes the plug comes off with 2 screws and put back on a plug in again with a new one, then re screw and your outta there. ope that helps.

Posted on Jul 17, 2008

Molson02536
  • 3854 Answers

SOURCE: 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.

Posted on Nov 22, 2009

ZJLimited
  • 17970 Answers

SOURCE: How do you replace a oxygen sensor?

For 2000 Daewoo Lanos 1.6L MFI DOHC 4cyl the Oxygen Sensor is located under vehicle, driver side, below seating area, mounted in exhaust pipe in front of catalytic converter.

Good luck (remember rated this).

Posted on Jul 22, 2010

ZJLimited
  • 17970 Answers

SOURCE: Location of oxygen sensor on 2004 blazer check

Removal & Installation

Raise and support the vehicle.
Support rear of the powertrain frame.
Remove four rear frame bolts.
Lower the frame no more than 73.2 mm (3 inches).
Disconnect the rear oxygen sensor electrical connector.
Remove the rear oxygen sensor from the rear exhaust manifold.

To install:

Install the rear oxygen sensor in the rear exhaust manifold. Tighten the rear heated oxygen sensor (HO2S) sensor to 41 Nm (30 ft. lbs.).
Connect the rear oxygen sensor connector.
Raise the frame.
Install the four rear frame bolts. Tighten the frame bolts to 100 Nm (74 ft. lbs.).
Lower the vehicle.


Heated Oxygen Sensor Bank 1 Sensor 1 (HO2S 1/1)

WARNING: Handle the oxygen sensors carefully in order to prevent damage to the component. Keep the electrical connector and the exhaust inlet end free of contaminants. Do not use cleaning solvents on the sensor. Do not drop or mishandle the sensor.

CAUTION: Remove oxygen sensors with the engine temperature above 48C (120F). Otherwise the oxygen sensors may be difficult to remove.

A special anti-seize compound is used on the oxygen sensor threads. New service sensors should already have the compound applied to the threads. Coat the threads of a reused sensor with anti-seize compound P/N 5613695 or equivalent.

11_14_2011_1_39_03_pm.jpg

Fig. Showing the location of the HO2S Bank 1 Sensor 1

Heated Oxygen Sensor Bank 1 Sensor 2 (HO2S 1/2)

CAUTION
Handle the oxygen sensors carefully in order to prevent damage to the component. Keep the electrical connector and the exhaust inlet end free of contaminants. Do not use cleaning solvents on the sensor. Do not drop or mishandle the sensor.

CAUTION: Remove oxygen sensors with the engine temperature above 48C (120F). Otherwise the oxygen sensors may be difficult to remove.

WARNING: A special anti-seize compound is used on the oxygen sensor threads. New service sensors should already have the compound applied to the threads. Coat the threads of a reused sensor with anti-seize compound P/N 5613695 or equivalent.

11_14_2011_1_40_07_pm.jpg

Fig. Showing the location of the HO2S Bank 1 Sensor 2

Raise and support the vehicle.
Remove the heat shield.
Disconnect the heated oxygen sensor electrical connector.
Remove the heated oxygen sensor.

To install:

Install the heated oxygen sensor. Tighten the heated oxygen sensor (HO2S) to 41 Nm (30 ft. lbs.).
Connect the heated oxygen sensor electrical connector. CAUTION
Ensure connectors are securely installed beneath harness heat shield to prevent damage.
Install the heat shield.
Lower the vehicle.


Heated Oxygen Sensor Bank 2 Sensor 1 (HO2S 2/1)

CAUTION: Handle the oxygen sensors carefully in order to prevent damage to the component. Keep the electrical connector and the exhaust inlet end free of contaminants. Do not use cleaning solvents on the sensor. Do not drop or mishandle the sensor.

CAUTION: Remove oxygen sensors with the engine temperature above 48C (120F). Otherwise the oxygen sensors may be difficult to remove.

WARNING: A special anti-seize compound is used on the oxygen sensor threads. New service sensors should already have the compound applied to the threads. Coat the threads of a reused sensor with anti-seize compound P/N 5613695 or equivalent.

Raise and support the vehicle.
Remove the air deflector.
Disconnect the front oxygen sensor electrical connector.
Remove the front oxygen sensor from the front exhaust manifold.

11_14_2011_1_37_39_pm.jpg

Fig. Showing the location of the HO2S Bank 2 Sensor 1

To install:
Install the front oxygen sensor in the front exhaust manifold. Tighten the front HO2S sensor to 41 Nm (30 ft. lbs.).
Connect the front oxygen sensor electrical connector.
Install the air deflector.
Lower the vehicle.

Hope this helps; also keep in mind that your feedback is important and I'll appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using Fixya, and have a nice day.

Posted on Nov 14, 2011

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

2 Answers

How many o2 sensors a Cadillac Deville 2000 has. I find 3 and replace them but still I have P0155 code for B2S1? Need help!


Which engine ? Some have four and always double check the connections as they can set the codes .

Mar 01, 2016 | Cadillac 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

    1 Answer

    How to test oxygen sensor


    When we detect a lean mixture code from our vehicles, our first reaction may be to replace the oxygen sensor. However, testing oxygen sensors before replacing them is a good idea. The best way to check the operation of the sensor is to run a simple test. And all you need is a voltmeter. A voltmeter is usually cheaper than car diagnostic tools and is available within 100 eurs. Here I will use an original Autel PowerScan PS100 for 56 eurs from EOBD2.FR.
    How to check if your oxygen sensor is bad and needs to be replaced:
    Step 1. Find the oxygen sensor sensing wire, connect Autel PS100 to the feedback wire and ground and then choose the mili volt operation.
    Step 2. Turn on the ignition key to start the vehicle and run the engine at idle to warm it up. Watch data on PS100. The voltage should move slightly at whatever voltage the sensor is centered at.
    Step 3. When you pull the oxygen sensor data stream up, the output voltage from the sensors should constantly bounce between high and low with the meter dropping and rising, as the engine is running in closed loop. The volt meter should stabilize at the original operating voltage when the engine returns to idle.
    If your oxygen sensor does not show the above reactions, it is probably that it is bad.
    Note: If the error code shows a malfunction exists with related components such as an engine misfire or other engine problems, please do not perform this test.

    Jul 09, 2014 | 2000 Buick LeSabre

    1 Answer

    Code p0420 acura m'dx


    1996-newer (OBD-II) vehicles use oxygen sensors and a catalytic converter to reduce emissions. There is one O2 (oxygen) sensor in front of the catalytic converter (called upstream), and one behind it (downstream). When the engine is warmed up and running normally the upstream oxygen sensor reading fluctuates and the downstream one is fairly steady. In the case where both readings are fairly steady, a P0420 check engine light code is set.
    Possible Causes: Oxygen (O2) sensor not working correctly
    Damaged or leaking exhuast (pipe, manifold, catalytic converter)
    Damaged catalytic converter
    Diagnostic Help:
    To diagnose a P0420 trouble code we begin by checking for exhaust leaks under the vehicle. Then use an oscilliscope to check the waveforms of both upstream and downstream O2 sensors. The front reading should vary, the rear should be steady. Replace as necessary. Check the rear Heated O2 Sensor. Check the catalytic converter, replace if necessary. If necessary, check for wiring and component concerns. See our article "Automotive Circuit Testing 101", if you need more assistance with this. Remember to refer to an model-specific repair manual for proper instruction.

    Jan 20, 2014 | 2005 Acura MDX

    2 Answers

    P1130


    Always use Google to look up codes
    & solutions
    OBD P1130

    Jul 21, 2013 | 2002 Toyota Camry

    1 Answer

    How can you tell if oxygen sensor is bad


    Hello there and welcome to fixya
    Remove the oxygen sensor connector cover and check the oxygen sensor's operational voltage. Consult your vehicle's manual to find the wiring schematic. Back probe the sensor's connector with the meter leads. Start engine again and monitor voltage readings. Voltage should switch between high and low, from approximately 0.1 to 0.9 vdc. Replace sensor if it fails this test.
    3

    Unplug the sensor connector and test the sensor's heating circuit. Using your vehicle's wiring schematic, check for 12 vdc and also for a good ground. If voltage or a ground is not present, repair circuit between connector and battery.
    4

    Measure internal resistance of the sensor's heater circuit. Check that the heater resistance is a low reading. Replace sensor if the heater resistance is infinity or extremely high.
    5

    Unplugging the sensor's connector while testing the oxygen sensor will often set fault codes and illuminate the "Check Engine" light. After all checks and repairs have been made, clear the fault codes by following the procedure in your vehicle's

    Read more: How to Test Oxygen Sensors ' eHow.com http://www.ehow.com/how_4780847_test-oxygen-sensors.html#ixzz1hPBA4wKH

    Dec 23, 2011 | Cars & Trucks

    1 Answer

    I need to know what tools to use when replacing oxygen sensor. and where on the car is the oxygen sensor located. Please help


    22mm wrench or 15/16" or an O2 Socket

    Which Sensor ?

    #1 is closest to the engine,before or in the exhaust converter

    #2 is the Monitor,in the converter outlet

    O2 Sensors get replaced at 100,000 miles or
    when they fail

    Failing means you have to component test it,
    to see if it works correctly.

    80% of O2 Codes are Vacuum Leaks or Misfires

    Jul 17, 2011 | 2000 Ford Contour

    1 Answer

    1995 Cadi SLS Codes, P0030 & P0036, Ckt Fuse or Relay Defective, checked fuse ok, where is relay located?


    Hi there,

    P0030 = HO2S Heater Control Circuit (Bank 1 Sensor 1) - No.1 Heated Oxygen sensor on bank 1.
    P0036 = HO2S Heater Control Circuit (Bank 1 Sensor 2) - No. 2 Heated Oxygen sensor on bank 1

    For both of these to trigger on the same bank, means most likely an Open or Short to Ground condition (somewhere on the Bank 1 circuit) stopping the HO2 sensors from reaching their working temperature.

    Check the following in this order:

    1) Using a multimeter, check 'continuity' of the Oxygen circuit FUSE terminals (don't rely on visual inspection alone) or replace fuse with a known good one.
    2) Check for moisture getting into both oxygen sensor connector terminals (bank 1).
    3) Check for good connection at Oxygen sensors (bank 1).
    3) Have both heated oxygen sensors on Bank 1 tested (ensure their values are to specification).
    4) Check HO2 pin-outs of the PCM for correct voltage.

    Only replace the HO2 sensors as a last resort (if out of spec).

    Then engine department relay centre & fusebox location is behind the washer bottle, but I believe the HO2 sensors are connected direct to the PCM, not a relay.

    Cheers,


    "If this has helped you in any way, please rate this solution"

    May 07, 2011 | Cadillac Seville Cars & Trucks

    2 Answers

    Improper fuel combustion; need to pass emissions test


    Sounds like you need to replace your oxygen sensors.  If you have a four cylinder I think you only have one oxygen sensor and the six cylinder I know has 2.  You can check that out at your local parts store.  Anyway, the oxygen sensor helps the computers in your car make sure that you are getting the correct amount of fuel and air during combustion thus controlling your emissions.  I would think that if you haven't replace these in a while that is what is probably keeping you from passing your test.  Change the oxygen sensors and put a bottle of good fuel injector cleaner in a full tank of gas and you should be good to go.  I would suggest Greased Lightening fuel injector cleaner that can be purchased at Napa and O'Reilley Auto Parts.  Let me know if you have any other questions.  Thanks for an honest rating and for using FixYa!

    May 24, 2009 | 1995 Ford Contour

    1 Answer

    Trouble code p2000


    P2000 NOx Trap Efficiency Below Threshold (Bank 1)


    This code usually indicates a faulty oxygen sensor(s). However, in some instances it can also be used for a faulty catalytic converter as well, since the O2 sensors are located on the exhaust system along with the cat. converter(s). You should check your O2 sensors before replacing the catalytic converter. Here is a guide on checking these sensors.

    All engines run on a optimum fuel to air mixture called "stokiometric" which means chemically balanced. This balanced fuel to air ratio is 14.7 to 1, 14.7 parts air to 1 part fuel. The oxygen sensor is created using the active chemical such as zirconium, electrochemical (also known as Galvanic), infrared, ultrasonic and very recently laser. When a lean mixture code is detected by you or a technician the first tendency is to replace the oxygen sensor. The best way to check the operation of the sensor is to run a simple test. No matter if your engines oxygen sensor has one wire or four there is only one sensing wire that feedbacks information to the PCM. To find this wire you will need a car repair manual. If a trouble code is present that pertains to a oxygen heater sensor failure, replace the sensor to repair the problem. A oxygen sensor must be warm before it will operate properly.


    Warning: If a malfunction exists with related components such as an engine misfire or engine vacuum leak do not perform this test. The oxygen sensor to designed to operate within a particular range, if this range is exceeded the sensor will give the appearance that it has failed.

    SENSOR TEST PROCEDURE---

    • Step 1 - Once the oxygen sensor sensing wire has been located connect a volt meter to the feedback wire and ground. Select the millivolt operation on the meter.
    • Step 2 - Next, start and run the engine at idle until warm (about 15 minutes). Observe the voltmeter, it should bounce slightly at whatever voltage the sensor is centered at (about 150 millivolts).
    • Step 3 - Continue to observe the meter and have a helper rap the throttle. The meter should drop for a split second as the mixture leans out in the first milliseconds of the throttle bore being opened. Then quickly rise for a spit second as the throttle closes and the mixture richens. The volt meter should stabilize at the original operating voltage when the engine returns to idle.
    Remember, if the sensor fails this test, replace it but if it passes, replace the Catalytic converter...

    Please rate and have a great day:)



    Apr 30, 2009 | Dodge Ram 3500 Cars & Trucks

    Not finding what you are looking for?
    2000 Chevrolet Blazer Logo

    Related Topics:

    238 people viewed this question

    Ask a Question

    Usually answered in minutes!

    Top Chevrolet Experts

    yadayada
    yadayada

    Level 3 Expert

    75744 Answers

    Colin Stickland
    Colin Stickland

    Level 3 Expert

    22114 Answers

    Jeff Turcotte
    Jeff Turcotte

    Level 3 Expert

    8123 Answers

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

    Answer questions

    Manuals & User Guides

    Loading...