What is the purpose and location of oxygen sensors in Chevrolet Cobalt,HHR and Saturn ION with OBD-II engine management systems?

There is a galvanic battery called oxygen sensor that gives out a small voltage based on the amount of oxygen in the exhaust gases. A voltage change from stoichiometric 14.7:1 is needed by the catalyst for proper function. Motor vehicles whose engines are controlled by On-Board Diagnostics II (OBD-II) can confirm if the oxygen sensor and PCM feedback circuit are working correctly. Oxygen content level in the exhaust gas before and after catalytic converter can be used to determine it. The sensors upstream and downstream have heaters making them warm up quickly. It should be noted, though, that these sensors are very fragile and should be handled with extreme care as they can easily break when being serviced or replaced. In case of sensor replacement, it is important to start an engine within a short period to help remove old ones without damaging them further during removals. An upstream oxygen sensor can be screwed off with an oxygen socket and it lies on left side of the exhaust manifold while downstream one unscrews likewise using an oxygen socket located behind a catalytic converter. After removing sensors, any old sensor must be reused by applying anti-seize compound to ensure reinstallation of new sensors with already coated threads otherwise might also require application of anti-seize compounds as well.

Genuine Chevrolet Cobalt Oxygen Sensor

Oxygen O2 Sensor

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6 Oxygen Sensors found

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Chevrolet Cobalt Sensor Asm,Heated Oxygen
Part Number: 12578576
$90.03 MSRP: $186.94
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Product Specifications
- Other Name: SENSOR, Computer Control Sensors; Oxygen Sensor, Rear Oxygen Sensor
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2005-2010 Chevrolet Cobalt | 2 DOOR, 4 DOOR, LEVEL 4 PERFORMANCE (SS) 2 DOOR, LEVEL 4 PERFORMANCE/SC (SS) 2 DOOR, LEVEL 4 PERFORMANCE/SC (SS) 4 DOOR, LEVEL ONE (LS) 2 DOOR, LEVEL ONE (LS) 4 DOOR, LEVEL THREE (SS) 2 DOOR, LEVEL THREE (SS) 4 DOOR, LEVEL TWO (LT) 2 DOOR, LEVEL TWO (LT) 4 DOOR | 4 Cyl 2.0L, 4 Cyl 2.2L, 4 Cyl 2.4L
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Chevrolet Cobalt Sensor Assembly, Heated Oxygen (Position 1)
Part Number: 12611127
$40.94 MSRP: $85.00
You Save: $44.06 (52%)
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Product Specifications
- Other Name: SENSOR, Computer Control Sensors; Front Oxygen Sensor, Oxygen Sensor
- Replaces: 12609001
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2007-2010 Chevrolet Cobalt | 2 DOOR, 4 DOOR, LEVEL 4 PERFORMANCE/SC (SS) 2 DOOR, LEVEL 4 PERFORMANCE/SC (SS) 4 DOOR, LEVEL ONE (LS) 2 DOOR, LEVEL ONE (LS) 4 DOOR, LEVEL THREE (SS) 2 DOOR, LEVEL THREE (SS) 4 DOOR, LEVEL TWO (LT) 2 DOOR, LEVEL TWO (LT) 4 DOOR | 4 Cyl 2.2L
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Chevrolet Cobalt Sensor Assembly, Heated Oxygen (Position 1)
Part Number: 12580827
$63.13 MSRP: $131.10
You Save: $67.97 (52%)
Ships in 1-2 Business Days
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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:
- 2005-2008 Chevrolet Cobalt | 2 DOOR, 4 DOOR, LEVEL 4 PERFORMANCE (SS) 2 DOOR, LEVEL 4 PERFORMANCE/SC (SS) 2 DOOR, LEVEL ONE (LS) 2 DOOR, LEVEL ONE (LS) 4 DOOR, LEVEL THREE (SS) 2 DOOR, LEVEL THREE (SS) 4 DOOR, LEVEL TWO (LT) 2 DOOR, LEVEL TWO (LT) 4 DOOR | 4 Cyl 2.2L, 4 Cyl 2.4L
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Chevrolet Cobalt Sensor Assembly, Heated Oxygen (Position 1)
Part Number: 12589380
$103.57 MSRP: $185.78
You Save: $82.21 (45%)
Ships in 1-2 Business Days
ADD TO CART
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:
- 2008-2010 Chevrolet Cobalt | LEVEL 4 PERFORMANCE/SC (SS) 2 DOOR, LEVEL 4 PERFORMANCE/SC (SS) 4 DOOR | 4 Cyl 2.0L
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Chevrolet Cobalt Sensor Assembly, Heated Oxygen (Position 2)
Part Number: 12616506
$77.88 MSRP: $161.72
You Save: $83.84 (52%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: SENSOR, Computer Control Sensors; Oxygen Sensor, Rear Oxygen Sensor
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2008-2010 Chevrolet Cobalt | LEVEL 4 PERFORMANCE/SC (SS) 2 DOOR, LEVEL 4 PERFORMANCE/SC (SS) 4 DOOR | 4 Cyl 2.0L
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Chevrolet Cobalt Sensor Assembly, Heated Oxygen (Position 1) *Black
Part Number: 12568234
$51.78 MSRP: $107.52
You Save: $55.74 (52%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: SENSOR, Computer Control Sensors; Front Oxygen Sensor, Oxygen Sensor
- Replaces: 12569496
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2005-2007 Chevrolet Cobalt | 2 DOOR, 4 DOOR, LEVEL 4 PERFORMANCE (SS) 2 DOOR, LEVEL 4 PERFORMANCE/SC (SS) 2 DOOR, LEVEL ONE (LS) 2 DOOR, LEVEL ONE (LS) 4 DOOR, LEVEL THREE (SS) 2 DOOR, LEVEL THREE (SS) 4 DOOR, LEVEL TWO (LT) 2 DOOR, LEVEL TWO (LT) 4 DOOR | 4 Cyl 2.0L

Chevrolet Cobalt Oxygen Sensor

The Oxygen Sensor in Chevrolet Cobalt is used to control the air fuel mixture on the engine exhaust so that performance is raised and pollution is lowered. According to the comparative measurement of oxygen present in the exhaust and in the air, the sensor develops a voltage output that informs whether the mixture is lean or rich. This feedback also helps the engine control computer to control the pulse width of the fuel injector in such a way as to get maximum efficiency from the catalytic converter while at the same time, reduce exhaust emissions. Such sensor is usually made of zirconium dioxide with platinum coating and contains a heater for immediate activity at high temperature. Some of the newer vehicles, there is likelihood that an air-fuel ratio sensor is fitted, which provides a way of measuring from much wider, in order to give better fuel control. The care and inspection of the oxygen sensor should be performed frequently and that failure to do so leads to high emissions and fuel consumption; poor engine performance.

Each OEM Chevrolet Cobalt 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.

Chevrolet Cobalt Oxygen Sensor Parts Questions & Experts Answers

Sensor Assembly, Heated Oxygen (Position 1)
12589380
Q: What is the purpose and location of oxygen sensors in Chevrolet Cobalt,HHR and Saturn ION with OBD-II engine management systems?
A: There is a galvanic battery called oxygen sensor that gives out a small voltage based on the amount of oxygen in the exhaust gases. A voltage change from stoichiometric 14.7:1 is needed by the catalyst for proper function. Motor vehicles whose engines are controlled by On-Board Diagnostics II (OBD-II) can confirm if the oxygen sensor and PCM feedback circuit are working correctly. Oxygen content level in the exhaust gas before and after Catalytic Converter can be used to determine it. The sensors upstream and downstream have heaters making them warm up quickly. It should be noted, though, that these sensors are very fragile and should be handled with extreme care as they can easily break when being serviced or replaced. In case of sensor replacement, it is important to start an engine within a short period to help remove old ones without damaging them further during removals. An upstream oxygen sensor can be screwed off with an oxygen socket and it lies on left side of the exhaust manifold while downstream one unscrews likewise using an oxygen socket located behind a catalytic converter. After removing sensors, any old sensor must be reused by applying anti-seize compound to ensure reinstallation of new sensors with already coated threads otherwise might also require application of anti-seize compounds as well.