What is the function and maintenance of the exhaust oxygen sensor on Buick Century?

The exhaust oxygen sensor, or 02S, is located in the exhaust pipe and aims to measure the amount of oxygen in the exhaust gas, Newer models of the sensor have a heated element different from the typical sensors. It functions to map the air/fuel mixture that is supplied to the engine, the oxygen that combines with the sensor to produce voltage, detectable by the ECM/PCM that ranges from 0.1 volt in high oxygen lean mixture to 0.9 volts in low lean oxygen. It is difficult to test the sensor when you don't have scan tools, and codes 44, 45 or 131-134 do not mean that the sensor is bad, as it can mean that such things as a dirty air filter of a vacuum leak. Due to the fact that the electrical pigtail and connector are installed permanently, contamination of this sensor is strictly prohibited. It is recommended that cleaning solvents should not be used and care should be taken not to damage the engines particularly if the actual temperature is less than 120F / 48C. There is a recommended application of a heat riser solvent every time the sensor is removed, and it should be changed after 30 000 miles The steps involved are finding the sensor, unclipping the electrical connector, applying of heat riser solvent and unscrewing the sensor. For installation, the new sensor's threads have to be protected by an electrically conductive anti-seize compound, and then the threads are to be tightened to 30 fl. lbs. Torque specified was confirmed without overtightening to 42 Nm and electrical connector was re connected in a way that the pigtail was not strained.

Genuine Buick Century Oxygen Sensor

Oxygen O2 Sensor

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7 Oxygen Sensors found

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Buick Century Sensor,Heated Oxygen
Part Number: 12559850
$57.50 MSRP: $119.40
You Save: $61.90 (52%)
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Product Specifications
- Other Name: SENSOR, Computer Control Sensors; Front Oxygen Sensor, Oxygen Sensor
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2001-2004 Buick Century | CUSTOM, GL, GLX, GS, LIMITED, LS | 6 Cyl 3.1L
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Buick Century Sensor Asm,Heated Oxygen
Part Number: 19178924
$66.89 MSRP: $138.88
You Save: $71.99 (52%)
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Product Specifications
- Other Name: SENSOR, Computer Control Sensors; Oxygen Sensor, Rear Oxygen Sensor
- Replaces: 25161130, 25312207, 12587214, 19178921, 25164983, 25312196
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1997-1998 Buick Century | CUSTOM, GS, LIMITED, LS, REGAL | 6 Cyl 3.1L
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Buick Century Sensor Asm,Heated Oxygen
Part Number: 19178958
$60.51 MSRP: $125.66
You Save: $65.15 (52%)
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Product Specifications
- Other Name: SENSOR, Computer Control Sensors; Front Oxygen Sensor, Manifold, Oxygen Sensor
- Replaces: 25178022, 25312203, 25312211, 25164488
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1997-2000 Buick Century | CUSTOM, GS, LIMITED, LS, REGAL | 6 Cyl 3.1L
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Buick Century Sensor Asm,Heated Oxygen
Part Number: 19178930
$61.22 MSRP: $127.12
You Save: $65.90 (52%)
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Product Specifications
- Other Name: SENSOR, Computer Control Sensors; Front Oxygen Sensor, Oxygen Sensor
- Replaces: 25312184, 25165313, 25171579
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1996 Buick Century | CUSTOM, SPECIAL, SPECIAL STATION WAGON | 6 Cyl 3.1L
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Buick Century Sensor Assembly, Heated Oxygen (Position 1)
Part Number: 12590789
$33.90 MSRP: $109.07
You Save: $75.17 (69%)
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Product Specifications
- Other Name: SENSOR, Computer Control Sensors; Oxygen Sensor
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2005 Buick Century | CUSTOM 4 DOOR | 6 Cyl 3.1L
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Buick Century Sensor Asm,Heated Oxygen
Part Number: 19178747
$83.52 MSRP: $151.86
You Save: $68.34 (45%)
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Product Specifications
- Other Name: SENSOR, Computer Control Sensors; Oxygen Sensor
- Replaced by: 19355307
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1999-2003 Buick Century | CUSTOM, GL, GLX, GS, LIMITED, LS | 6 Cyl 3.1L
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Buick Century Sensor,Exhaust Oxygen
Part Number: 19211437
$15.80 MSRP: $33.26
You Save: $17.46 (53%)
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Product Specifications
- Other Name: SENSOR, Computer Control Sensors; Oxygen Sensor
- Replaces: 19178952, 25171573, 25166816, 25171574, 25162693, 25106073, 25107378, 25165118, 25171581, 25132068, 25165120, 25162600, 19178953, 19178943, 25133185, 25133076, 19178919, 25162753
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1982-1992 Buick Century | CUSTOM 2 DOOR, CUSTOM 4 DOOR, CUSTOM STATION WAGON, LIMITED 2 DOOR, LIMITED 4 DOOR, SPECIAL 4 DOOR | 4 Cyl 2.5L, 6 Cyl 2.8L, 6 Cyl 3.0L, 6 Cyl 3.3L, 6 Cyl 3.8L

Buick Century Oxygen Sensor

An integrant of Buick Century auto is the Oxygen Sensor which has the responsibility of measuring the amount of unburned oxygen in the exhaust to set the air-fuel mixture that the car engine requires for optimal functioning and environmental conservation. Depending on the produced voltage signal proportional to oxygen concentration, the sensor reports to the engine control computer as to the status of the mixture- is it which is rich or lean, and thus the fuel injector pulse width can be adjusted in real time. Through Buick Century car models, manufacturers use oxygen sensors made of zirconium dioxide, and they can be either narrow-band or wide-band. Narrow-band sensors supply alternating rich/lean signals whereas the wide-band ones supply wider signal range for better control of air-fuel mixture ratios. These sensors may deteriorate over the time because of contaminants and therefore contribute to high emission levels and even poor engine performance. Freshwater and constant checkups and repair of the Oxygen Sensor will enhance better fuel efficiency of Buick Century automobiles.

Each OEM Buick Century Oxygen Sensor we offer is competitively priced and comes with the assurance of the manufacturer's warranty for the part. Furthermore, we guarantee the speedy delivery of your orders right to your doorstep. Our hassle-free return policy is also in place for your peace of mind.

Buick Century Oxygen Sensor Parts Questions & Experts Answers

Sensor Asm,Oxygen
5613719
Q: What is the function and maintenance of the exhaust oxygen sensor on Buick Century?
A: The exhaust oxygen sensor, or 02S, is located in the exhaust pipe and aims to measure the amount of oxygen in the exhaust gas, Newer models of the sensor have a heated element different from the typical sensors. It functions to map the air/fuel mixture that is supplied to the engine, the oxygen that combines with the sensor to produce voltage, detectable by the ECM/PCM that ranges from 0.1 volt in high oxygen lean mixture to 0.9 volts in low lean oxygen. It is difficult to test the sensor when you don't have scan tools, and codes 44, 45 or 131-134 do not mean that the sensor is bad, as it can mean that such things as a dirty air filter of a vacuum leak. Due to the fact that the electrical pigtail and connector are installed permanently, contamination of this sensor is strictly prohibited. It is recommended that cleaning solvents should not be used and care should be taken not to damage the engines particularly if the actual temperature is less than 120F / 48C. There is a recommended application of a heat riser solvent every time the sensor is removed, and it should be changed after 30 000 miles The steps involved are finding the sensor, unclipping the electrical connector, applying of heat riser solvent and unscrewing the sensor. For installation, the new sensor's threads have to be protected by an electrically conductive anti-seize compound, and then the threads are to be tightened to 30 fl. lbs. Torque specified was confirmed without overtightening to 42 Nm and electrical connector was re connected in a way that the pigtail was not strained.