How to replace the heated oxygen sensor at position 1 on Chevrolet Cobalt?

Start by getting the required replacement tools that should include the Oxygen Sensor wrench (J 39194-C). You must start by taking off the Exhaust Manifold heat shield before separating the Oxygen Sensor harness connector. The Oxygen Sensor wrench (J 39194-C) will assist in removing the sensor while maintaining both the pigtail and connector undamaged to prevent sensor operation problems. For safe installation of the new Oxygen Sensor avoid applying more force than needed since this may cause damage to the Exhaust Manifold and pipe thread areas. The threads of the new Oxygen Sensor need anti-seize compound saturn p/n 21485279 for thread removal support when this application becomes necessary. Fasten the Oxygen Sensor to a torque of 30 n.m (22 lb ft). Attach the Oxygen Sensor harness connector followed by placing the Exhaust Manifold heat shield back in position.

OEM Chevrolet Cobalt Oxygen Sensor

Oxygen O2 Sensor

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6 Oxygen Sensors found

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Chevrolet Cobalt Oxygen Sensor Part Number: 12611127
$41.85 MSRP: $85.00
You Save: $43.15 (51%)
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Product Specifications
- Other Name: Sensor Assembly-Heated Oxygen (Position 1); Front Oxygen Sensor; Sensor, Computer Control Sensors
- Replaces: 12609001
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2007-2010 Chevrolet Cobalt | Base, LS, LT, LTZ | 4 Cyl 2.2 L GAS
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Chevrolet Cobalt Oxygen Sensor Part Number: 12589380
$139.50 MSRP: $250.22
You Save: $110.72 (45%)
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Product Specifications
- Other Name: Sensor Assembly-Heated Oxygen (Position 1); Wideband Air/Fuel Sensor; Air / Fuel Ratio Sensor; Air/Fuel Sensor; Front Oxygen Sensor; Sensor, Computer Control Sensors
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2008-2010 Chevrolet Cobalt | SS | 4 Cyl 2.0 L GAS
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Chevrolet Cobalt Oxygen Sensor Part Number: 12580827
$65.84 MSRP: $133.72
You Save: $67.88 (51%)
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Product Specifications
- Other Name: Sensor Assembly-Heated Oxygen (Position 1); Front Oxygen Sensor; Sensor, Computer Control Sensors
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2005-2008 Chevrolet Cobalt | Base, LS, LT, LTZ, Sport, SS | 4 Cyl 2.2 L GAS, 4 Cyl 2.4 L GAS
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Chevrolet Cobalt Oxygen Sensor Part Number: 12578576
$84.49 MSRP: $171.60
You Save: $87.11 (51%)
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Product Specifications
- Other Name: Sensor, Computer Control Sensors; Rear Oxygen Sensor
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2005-2010 Chevrolet Cobalt | Base, LS, LT, LTZ, Sport, SS | 4 Cyl 2.0 L GAS, 4 Cyl 2.2 L GAS, 4 Cyl 2.4 L GAS
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Chevrolet Cobalt Oxygen Sensor Part Number: 12616506
$79.62 MSRP: $161.72
You Save: $82.10 (51%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Sensor Assembly-Heated Oxygen (Position 2); Rear Oxygen Sensor; Sensor, Computer Control Sensors
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2008-2010 Chevrolet Cobalt | Base, LS, LT, Sport, SS | 4 Cyl 2.0 L GAS, 4 Cyl 2.2 L GAS, 4 Cyl 2.4 L GAS
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Chevrolet Cobalt Oxygen Sensor Part Number: 12568234
$55.45 MSRP: $112.62
You Save: $57.17 (51%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Sensor, Computer Control Sensors; Front Oxygen Sensor
- Replaces: 12569496
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2005-2007 Chevrolet Cobalt | LS, LT, LTZ, SS | 4 Cyl 2.0 L GAS, 4 Cyl 2.2 L GAS, 4 Cyl 2.4 L GAS

Chevrolet Cobalt Oxygen Sensor

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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.

Chevrolet Cobalt Oxygen Sensor Parts and Q&A

Oxygen Sensor
12578576
Q: How to replace the heated oxygen sensor at position 1 on Chevrolet Cobalt?
A:
Start by getting the required replacement tools that should include the Oxygen Sensor wrench (J 39194-C). You must start by taking off the Exhaust Manifold heat shield before separating the Oxygen Sensor harness connector. The Oxygen Sensor wrench (J 39194-C) will assist in removing the sensor while maintaining both the pigtail and connector undamaged to prevent sensor operation problems. For safe installation of the new Oxygen Sensor avoid applying more force than needed since this may cause damage to the Exhaust Manifold and pipe thread areas. The threads of the new Oxygen Sensor need anti-seize compound saturn p/n 21485279 for thread removal support when this application becomes necessary. Fasten the Oxygen Sensor to a torque of 30 n.m (22 lb ft). Attach the Oxygen Sensor harness connector followed by placing the Exhaust Manifold heat shield back in position.