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Where is the front oxygen sensor located - Cars & Trucks

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Type of vehicle? The O2 sensors are located in various places on different vehicles.

Semper Fi,
Z

Posted on May 04, 2017

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How many o2 sensors on a 99 Cadillac catera


Four .
Heated Oxygen Sensor (HO2S Bank 1 Position 1)
Located in RH front pipe of the exhaust catalytic converter
--
Engine Controls Connector End Views in Engine Controls
Heated Oxygen Sensor (HO2S Bank 1 Position 2)
Located in RH rear pipe of the exhaust catalytic converter
--
Engine Controls Connector End Views in Engine Controls
Heated Oxygen Sensor (HO2S Bank 2 Position 1)
Located in LH front pipe of the exhaust catalytic converter
--
Engine Controls Connector End Views in Engine Controls
Heated Oxygen Sensor (HO2S Bank 2 Position 2)
Located in LH rear pipe of the exhaust catalytic converter

Sep 21, 2015 | Cadillac Cars & Trucks

1 Answer

Oxygen Sensor location


The oxygen sensors are on the exhaust pipes in front and behind the catalytic converter(s).
Bank two is the side with cylinder number 2, and sensor one is in front of the cat.

Dec 13, 2012 | Volvo Cars & Trucks

1 Answer

Where is the o2 sensor on a 2004 blazer located


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.

Oct 14, 2011 | Cars & Trucks

1 Answer

Location of oxygen sensor on 2004 blazer check engine light keeps coming on. Replaced sensor no change. At bank 1 sensor is not connected when tested.


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.

Oct 12, 2011 | Cars & Trucks

3 Answers

Where is the oxygen sensor? and is there more than one/


O2 sensor is after catalytic convertor and only one and most never goes bad, just needs cleaned.

May 14, 2011 | 2001 Mazda Millenia

2 Answers

Where is the bank 1 sensor 1 o2 sensor located in a 2006 hyundai sontata gls v6?


The bank has to do with which side of the engine. The 'Sensor 1' indicates that it is upstream of the catalytic converter.

Heated Oxygen Sensor Removal & Installation Heated Oxygen Sensor (Front) (2.4L) hyundai-04-24-5822.gif

Heated Oxygen Sensor (Rear) (2.4L) hyundai-04-24-5823.gif

Heated Oxygen Sensor (Bank 1/Sensor 1) (3.3L) kia-04-00-5213.gif

Heated Oxygen Sensor (Bank 1/Sensor 2) (3.3L) kia-04-00-5214.gif

Heated Oxygen Sensor (Bank 2/Sensor 1) (3.3L) kia-04-00-5215.gif

Heated Oxygen Sensor (Bank 2/Sensor 2) (3.3L) hyundai-04-33-5855.gif

prev.gif next.gif

Jan 13, 2011 | 2006 Hyundai Sonata

1 Answer

I need a diagram of the exhaust system on a Mazda 626


0996b43f80203328.jpg enlarge_icon.gifenlarge_tooltip.gif Fig. Component Location Chart-2000 MPV

1 PCM 2 Mass air flow (MAF)/intake air temperature (IAT) sensor 3 Throttle position (TP) sensor 4 Fuel tank pressure sensor 5 Engine coolant temperature (ECT) sensor 6 Crankshaft position (CKP) sensor 7 Camshaft position (CMP) sensor 8 Knock sensor 9 Heated oxygen sensor (HO2S) (front, LH) 10 Heated oxygen sensor (HO2S) (front, RH) 11 Heated oxygen sensor (HO2S) (rear, LH) 12 Heated oxygen sensor (HO2S) (rear, RH) 13 EGR boost sensor 14 Power steering pressure (PSP) switch 15 Main relay


0996b43f8020330c.jpg enlarge_icon.gifenlarge_tooltip.gif Fig. Component Location Chart-2001 MPV

1 PCM 2 Mass air flow (MAF)/Intake air temperature (IAT) sensor 3 Throttle position (TP) sensor 4 Engine coolant temperature (ECT) sensor 5 Crankshaft position (CKP) sensor 6 Camshaft position (CMP) sensor 7 Knock sensor 8 Heated oxygen sensor (HO2S) (front, LH) 9 Heated oxygen sensor (HO2S) (front, RH) 10 Heated oxygen sensor (HO2S) (rear, LH)* 11 Heated oxygen sensor (HO2S) (rear, RH)* 12 EGR boost sensor


0996b43f8020330f.jpg enlarge_icon.gifenlarge_tooltip.gif Fig. Component Location Chart- 2002-06 MPV

May 22, 2010 | 2004 Mazda MPV

1 Answer

Change oxygen sensor


Under hood, center, front engine area, above exhaust pipe flange, mounted in exhaust manifold
Application:
Front
Under hood, center, rear engine area, above exhaust pipe flange, mounted in exhaust manifold
Application:
Rear

The oxygen sensor may be difficult to remove when the engine temperature is below 120°F (48°C). Excessive force may damage the threads in the exhaust manifold of exhaust pipe.
  1. Start the engine and let it warm up to 120°F (48°C), stop the engine and disconnect the negative battery cable.
  2. Detach the electrical connector from the oxygen sensor.
  3. Using a special, oxygen sensor socket, remove the oxygen sensor from the exhaust manifold or exhaust pipe.


NOTE A special anti-seize compound is used on the oxygen sensor threads. The compound consists of liquid graphite and glass beads. The graphite will burn away, but the glass beads will remain, making the sensor easier to remove. New or service sensors will already have the compound applied to the threads. If an oxygen sensor is removed from the engine and if for any reason, it is to be reinstalled, the threads must have this anti-seize compound applied before installation.
  1. Coat the threads of the oxygen sensor with anti-seize compound 5613695 or equivalent.
  2. Install the sensor and tighten it to 30 ft. lbs. (40 Nm).
  3. Reattach the electrical connector to the sensor and the negative battery cable.



0900c1528025ed0c.jpg enlarge_icon.gifenlarge_tooltip.gif Fig. Location of the rear O2 sensor


0900c1528025ed0d.jpg enlarge_icon.gifenlarge_tooltip.gif Fig. Location of the the front O2 sensor


0900c1528025ed0e.jpg enlarge_icon.gifenlarge_tooltip.gif Fig. Use a wrench or special socket to loosen the O2 sensor


0900c1528025ed0f.jpg enlarge_icon.gifenlarge_tooltip.gif Fig. When replacing or reinstalling an oxygen sensor, be sure to lube the threads sufficiently

Jan 19, 2010 | 1992 Cadillac DeVille

3 Answers

Were on exaust is oxygen sensor in 1999 subaru impreza auto sport


On the SOHC engine the front (A/F) oxygen sensor is located in the front section of the front catalytic converter. The rear oxygen sensor is located in the rear section of the front catalytic converter. On the DOHC engine the front oxygen sensor is located in the front section of the exhaust system, just past the crossover pipe. The rear oxygen sensor is located in the front section of the catalytic converter.

Oxygen sensor location-Baja 2.5L SOHC engine
c3fce0b.jpg

Oxygen sensor location-Baja 2.5L DOHC engine
7aac75e.jpg


On the 2.0L engine the front (A/F) oxygen sensor is located in the front section of the exhaust system, just past the crossover pipe. The rear oxygen sensor is located in the front section of the rear catalytic converter. On the 2.2L engine the front (A/F) oxygen sensor is located in the front section of the front catalytic converter. The rear oxygen sensor is located in the rear section of the rear catalytic converter.

Oxygen sensor location-Impreza 1998-2001 2.2L engine
a5973e4.jpg


moz-screenshot.pngOxygen sensor location-Impreza 1998-2002 2.5L SOHC engine
3a84717.jpg
I hope helped with this; remember rated this help. Good luck.

Nov 20, 2009 | 1999 Subaru Impreza

1 Answer

O2 Sensor on a 1996 Cadillac Eldorado


Hello mrsalbert, my name is JShreader. Thank you for choosing fixya.com

Depending on which oxygen sensor you are looking for...there are several of them throughout the Exhaust System. I will start out by giving you a brief description of what and oxygen sensor is, and they're general purpose.

DESCRIPTION
Four Heated Oxygen Sensors (HO2S) are mounted in the exhaust system where they monitor the oxygen content in the exhaust stream. There is an oxygen sensor mounted in each exhaust manifold and one on each end of the catalytic converter. the oxygen sensor located in the front exhaust manifold is the Bank 2 Sensor 1 (Front) sensor. The oxygen sensor located in the rear exhaust manifold is the Bank 1 Sensor 1 (Rear) sensor. The oxygen sensor located in the Y-pipe ahead of the catalytic converter is the Bank 1 Sensor 2 (Pre-converter) sensor. The oxygen sensor located in the catalytic converter outlet is the Bank 1 Sensor 3 (Post-converter) sensor.

OPERATION
An oxygen sensor acts like a battery because it creates its own signal voltage once it reaches operating temperature. This voltage is produced when the oxygen content in the exhaust stream is different than the oxygen content in the atmosphere. A lean condition (high oxygen content in exhaust) will produce a low voltage (near 0 volts) and a rich condition (low oxygen content in exhaust) will produce a high voltage (near one volt). The PCM provides a reference signal voltage (0.45 volt) and a ground to the sensor. The PCM reference voltage is necessary because the oxygen sensors do not provide their own voltage until they reach operating temperature.

HEATING ELEMENT
the oxygen sensors also incorporate a heating element inside of the sensor housing. This heating element is energized with the ignition On and allows the sensors to reach operating temperatures quickly. The PCM can then use oxygen sensor information sooner after engine start-up.

PCM INPUTS
The PCM uses oxygen sensor information during Closed Loop operation to constantly adjust fuel control to reduce exhaust emissions. Because the oxygen sensors provide information sooner after engine start-up, exhaust emissions are reduced. Faulty oxygen sensors will cause various driveability conditions and will set a DTC.

That being said...I uploaded a .pdf for you of pictures showing the locations of ALL the oxygen Sensors on your Vehicle. You can download it by clicking HERE.

I hope this helps you. If you have any more questions or need any more diagrams, please don't hesitate to ask...Thanks again, JShreader!

Apr 01, 2009 | 1996 Cadillac Eldorado

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