Question about 2004 Chevrolet Tahoe

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O2 sensor wires

Where is the easiest location to tap into the O2 sensor wires to install a E.I.F.E. device to go with the fuel-saver that I have installed? I know that bank 1 sensor wire is ppl/wht and bank 2 is ppl. Also is the PCM directly underneath the steering shaft?This is on a 2004 Tahoe with flex-fuel. 5.3 liter.

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Check here sir.. http://www.fuelsaver-mpg.com/doc/EfieCircuitBoard.html
please click the link provided.hope this helps

Posted on Dec 27, 2008

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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

Engine code P2096 for a 2005 Dodge Noen 2.0litre


P2096 is Post Catalyst Fuel Trim System To Lean Bank 1.
In most cases this code refers to a bad O2 sensor in the exhaust. Due to year etc, senor replacement. here is the technical info for the code. Indicating O2 sensor 1/2 meaning bank 1, sensor 2 plus shows other posssibles

SET CONDITION
If the PCM multiplies short term compensation by long term adaptive as well as a purge fuel multiplier and the result is below a certain value for 30 seconds over two trips, a freeze frame is stored, the MIL illuminates and a trouble code is stored. Two Trip Fault. Three good trips to turn off the MIL.

POSSIBLE CAUSES
Exhaust leak
Engine mechanical
1/2 O2 Sensor
(K141) O2 Sensor 1/2 signal circuit
(K299) O2 1/2 Heater control circuit
(K904) O2 Return downstream circuit
Fuel contamination

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. See: Initial Inspection and Diagnostic Overview\Initial Inspection

DIAGNOSTIC TEST
1. ACTIVE DTC

NOTE:
- Check the vehicle repair history. If the 1/2 O2 Sensor has been replaced make sure that the O2 sensor was properly installed and meets OEM specification.
- Check for contaminants that may have damaged the O2 Sensor: contaminated fuel, unapproved silicone, oil and coolant.

Ignition on, engine not running.
With a scan tool, read DTCs.

Q: Is the DTC active at this time?

YES: Go To 2
NO: Refer to the INTERMITTENT CONDITION Diagnostic Procedure. See: Component Tests and General Diagnostics Perform the POWERTRAIN VERIFICATION TEST. See: Verification Tests\Powertrain Verification Test


2. EXHAUST LEAK
Turn the ignition off.

WARNING: TO AVOID PERSONAL INJURY FROM THE EXHAUST SYSTEM BEING HOT, ALLOW THE EXHAUST TO COOL DOWN TO A SAFE TEMPERATURE BEFORE PERFORMING A PHYSICAL INSPECTION. FAILURE TO FOLLOW THESE INSTRUCTIONS CAN RESULT IN PERSONAL INJURY OR DEATH.

Visually and Physically inspect the exhaust system for holes, cracks, and blockage in the exhaust system.

Q: Is the exhaust system is good condition?

YES: Go To 3
NO: Repair or Replace as necessary. Perform the POWERTRAIN VERIFICATION TEST. See: Verification Tests\Powertrain Verification Test


3. ENGINE MECHANICAL
Check for any of the following conditions/mechanical problems.
AIR INDUCTION SYSTEM - must be free from leaks
ENGINE VACUUM - must be at least 13 inches in neutral
ENGINE VALVE TIMING - must be within specifications
ENGINE COMPRESSION - must be within specifications
ENGINE EXHAUST SYSTEM - must be free of any restrictions or leak
ENGINE PCV SYSTEM - must flow freely
TORQUE CONVERTER STALL SPEED - must be within specifications
POWER BRAKE BOOSTER - no internal vacuum leaks
FUEL - must be free of contamination
FUEL INJECTOR - plugged or restricted injector; control wire not connected to correct injector

Left side exhaust, 2nd O2 sensor back just after cat converter

zjlimited_822.gif

- Raise and support vehicle.
- Disconnect wire connector from O2S sensor.

CAUTION: When disconnecting sensor electrical connector, do not pull directly on wire going into sensor.

- Remove O2S sensor with an oxygen sensor removal and installation tool.
- Clean threads in exhaust pipe using appropriate tap.

INSTALLATION
Threads of new oxygen sensors are factory coated with anti-seize compound to aid in removal. DO NOT add any additional anti-seize compound to threads of a new oxygen sensor.

Install O2S sensor. Tighten to 30 N-m (22 ft. lbs.) torque .
Connect O2S sensor wire connector.
Lower vehicle.


Hope this helps and just 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.

Nov 01, 2011 | 2005 Dodge Neon

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

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

1 Answer

How to install oxygen sensors on 2000 Honda Accord?


The easiest way is to purchase the direct fit O2 sensors as you don't have to mess with splicing in a new connector. You will need a special O2 socket, and ratchet or a suitable wrench.
First locate the sensor(s), find the exhaust manifold, there should be one there, then follow it back, and you will see the other(s).
Disconnect the connector, then remove the O2 sensor with the socket or wrench. You may need to spray some WD40 or other similar lubricant if it doesn't want to come off.
Just do the opposite to install.

Feb 23, 2010 | 2000 Honda Accord

1 Answer

How do you change the downstream oxygen sensor in a 2003 saturn ion?


Downstream O2 sensor is the O2 sensor after the Catalytic converter. Jack the car off the ground so you can get under it, disconnect the wire leads and with a close end wrench. Snake the wire leads through and wrench and place the wrench one the O2 sensor and with a hammer, tap the wrench to break lose the O2 sensor from the exhaust pipe. Once the O2 sensor has loosen up, just remove and install the new O2 sensor. Reconnect the wire leads, start the car and listen for any exhaust leaks. Once no leak has been determined, Place car back on the ground and go for test drive. Check engine light should go off after three start up and car has reached it's operating temperature and DTC codes will be erased after 100start cycle. Good luck and be safe.

Jan 11, 2010 | 2003 Saturn ION

1 Answer

I want to change the O2 sensor in my 1999 dodge durango. Is it hard to do? It looks like it just plugs in, but I don't know the location where I would find it on my car. I have just seen a picture of what...


No...not hard to do.....if you have the right tool.

Hope this helps!

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Sensor sockets, like this one from Lisle®, are slotted on one side to accommodate wiring

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Most models have O2 sensors to monitor emissions before and after the catalytic converter

Removal & Installation
WARNING NEVER apply any type of grease to the O2 sensor electrical connector or attempt any soldering of the wiring harness. This will influence the sensors operation.


  1. Disconnect the negative battery cable.
  2. Raise and support the vehicle.

CAUTION The exhaust pipe gets extremely hot during engine operation, and if touched, severe burns can occur. If servicing the oxygen sensor, avoid contacting the exhaust system.


  1. Disconnect the wiring harness from the oxygen sensor.
  2. Remove the sensor using the appropriate tool.

NOTE The oxygen sensor threads are coated with an anti-seize compound. The compound must be removed from the mounting boss threads, either in the exhaust manifold or Y-pipe. An 18mm x 1.5 x 6E tap is required.


To install:
  1. Clean the threads of the mount to remove any old anti-seize compound.
  2. If the old sensor is to be reused, apply anti-seize compound to its threads. New sensors come with the compound already applied.
  3. Install and tighten the sensor to 22 ft. lbs. (30 Nm). Connect the wiring harness.
  4. Lower the vehicle.
  5. Connect the negative battery cable.

Oct 22, 2009 | 1999 Dodge Durango

2 Answers

Location O2 sensor after cat for Mazda Miata 2002


Just had BOTH of my O2 sensors replaced in my 2002 Miata.  The sensors are located
1. at the back of the engine compartment look down (on the passenger side ) You should see a spark plug looking device near the bottom of the engine (on the side) it has a short wire output that goes to a connector looking device on the other end. This O2 sensor had a short wire connector on the other end
Probably can be replaced from the top.
2.  This one is tougher --- From underneath the vehicle just after the catalytic converter  you should be able to see the Spark plug like O2 sensor .  The person who repaired it for me had to trace the wire from the O2 sensor.  It goes up into ( perhaps the frame or bottom of the vehicle INTO the Driver compartment under the drivers seat.  It is located near the Center Console  right at the carpet seam. It was about in a straight line from the BACK of the Drivers side Car Door.  He felt around -- and located the Connector (under the carpet near the center console. .  He checked underneath the car to the point where the wire disappeared --to confirm he had the correct wire.  
Once he located where the sensor wire led to --He had the old sensor out and wire connector disconnected and a  New sensor and the connector installed in about 10 minutes.  
The O2 sensor for this one was much longer than the first O2 sensor in the engine compartment He had to use some sort of standard release spray on the old sensor itself --to remove the old O2 Sensor.   Since it is exposed to the elements under the car.   Wrench, I think a screwdriver  and the spray were all the tools I remember him using.....

The autozone code indicated only the engine compartment sensor was bad.
The repair man told me Both usually go bad at the same time.  
I fixed the first one only -- turned out the warning light lit up a day or so later indicating the second O2 Sensor under the vehicle was bad.  Fixed that as well -- have had no problems since -- repair was about 4 months ago.....

Mar 23, 2009 | 2002 Mazda Miata

1 Answer

04 kia sorento runs poorly


Might be going super simple here but from what you have said have you checked the wiring on your sensors? If you know that one works and you swap it and its not working its very possible the wires farther up are shorted or burned somewhere.

Nov 28, 2008 | 2004 Kia Sorento

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