How to Change the Oxygen Sensor in a 2005 Chevy Cobalt

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The oxygen sensor within a 2005 Chevy Cobalt is an important part of regulating the vehicle's emissions. The sensor's main responsibility is to regulate and maintain all of the emissions of the vehicle's engine by closely monitoring and controlling the amount of oxygen within the exhaust. When the oxygen sensor goes bad or is damaged, the vehicle will not pass a required emissions test and will begin to use more fuel. The oxygen sensor is designed to install easily; it should plug right into place, making it a simple job for even a novice.

Things You'll Need

  • Socket wrench
  • Oxygen sensor socket
  • Replacement oxygen sensor
  • Place the Cobalt in "Park" on a level surface. Allow the Chevy to sit for 10 minutes. This will allow components to cool enough to touch but still be warm, which is ideal for replacing the oxygen sensor.

  • Open the hood of the Cobalt and identify the oxygen sensor. Look for a white, rubber, plug-type sensor on the passenger side of the exhaust manifold; this is the oxygen sensor.

  • Use a socket wrench paired with an oxygen sensor socket to loosen the sensor. Turn the wrench counter-clockwise until the oxygen sensor is loose. Remove the sensor from the manifold by pulling it off. The sensor will come off without much force.

  • Insert the replacement oxygen sensor onto the manifold. Secure the sensor by pushing it into place until the sensor clicks. Close the hood of the Cobalt.

References

  • Photo Credit dragster engine image by Robert Young from Fotolia.com
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