Honda Cars 2007-2008

Heated Oxygen Sensor

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Operation



Specific to:

Honda Accord 2007-2008

Honda Civic 2007-2008

Honda S2000 2007-2008

The Heated Oxygen (HO2S) sensor detects the oxygen content in the exhaust gas downstream of the Warm Up Three Way Catalytic Converter (WU-TWC), and sends signals to the ECM/PCM which varies the duration of fuel injection accordingly. To stabilize its output, the sensor has an internal heater. The ECM/PCM compares the HO2S output with the A/F sensor output to determine catalyst efficiency.

Specific to:

Honda Fit 2007-2008

The secondary Heated Oxygen (HO2S) sensor detects the oxygen content in the exhaust gas downstream of the three way catalytic converter (TWC), and sends signals to the ECM/PCM which varies the duration of fuel injection accordingly. To stabilize its output, the sensor has an internal heater. The ECM/PCM compares the HO2S output with the A/F sensor output to determine catalyst efficiency. The secondary HO2S is located on the TWC.

Removal & Installation



Specific to:

Honda S2000 2007-2008

  1. Disconnect the secondary Heated Oxygen (HO2S) sensor (Sensor 2) 4P connector.
  2.  
  3. Remove the secondary HO2S (Sensor 2).
  4.  

To install:

  1. Install the parts in the reverse order of removal.

    Click image to see an enlarged view

    Fig. Installing the HO2S sensor-S2000

  2.  

Specific to:

Honda Fit 2007-2008

  1. Remove the center console, and the rear heater upper duct.
  2.  
  3. Disconnect the secondary Heated Oxygen (HO2S) sensor connector.
  4.  
  5. Remove the secondary HO2S.
  6.  

To install:

  1. Install the parts in the reverse order of removal.
  2.  
  3. Tighten the sensor to 33 ft. lbs. (44 Nm).
  4.  

2.4L Engine

Specific to:

Honda Accord 2007-2008

  1. Pull back the carpet from the floor rail under the front edge of the front passenger seat to expose the secondary Heated Oxygen (HO2S) sensor 4P connector.
  2.  
  3. Disconnect the secondary HO2S 4P connector
  4.  
  5. Remove the secondary HO2S, and the covers.
  6.  

To install:

  1. Install the parts in the reverse order of removal.
  2.  

3.0L & 3.5L Engine Front Bank

Specific to:

Honda Accord 2007-2008

  1. Disconnect the front secondary Heated Oxygen (HO2S) sensor (Bank 2) 4P connector, and then remove the front secondary HO2S.
  2.  

To install:

  1. Install the parts in the reverse order of removal.
  2.  

3.0L & 3.5L Engine Rear Bank

Specific to:

Honda Accord 2007-2008

  1. Disconnect the rear secondary Heated Oxygen (HO2S) sensor (Bank 1) 4P connector, and then remove the rear secondary HO2S.
  2.  

To install:

  1. Install the parts in the reverse order of removal.
  2.  

Hybrid

Specific to:

Honda Civic 2007-2008

  1. Disconnect the secondary Heated Oxygen (HO2S) sensor 4P connector, and then remove the secondary HO2S.
  2.  

To install:

  1. Install the parts in the reverse order of removal.
  2.  

Non-hybrid

Specific to:

Honda Civic 2007-2008

  1. Disconnect the secondary Heated Oxygen (HO2S) sensor 4P connector, and then remove the secondary HO2S.
  2.  

To install:

  1. Install the parts in the reverse order of removal.
  2.  

Testing



Specific to:

Honda Fit 2007-2008


NOTE
See applicable tests for specific DTCs in -DIAGNOSIS and TESTING- section.

 
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