Heated Oxygen Sensor (HO2S) Repair Procedures

Inspection

1. 1
   Turn the ignition off.
2. 2
   Disconnect the HO2S connector.
3. 3
   Measure the resistance between terminals 4 and 5 [B1/S1] of the HO2S. Measure the resistance between terminals 3 and 4 [B1/S2] of the HO2S.
4. 4
   Make sure the resistance is within specification. HO2S [Bank 1/Sensor 1] (linear type)

   Item	Specification
   Heater Resistance (?)	2,5 ~ 4,0 [20 °C]

   
   HO2S [Bank 1 / Sensor 2] (Binary Type)

   A/F Ratio (?)	Output voltage (V)
   RICH	approx. 0.92
   LEAN	approx. 0.04

   
   

   Item	Specification
   Heater Resistance (?)	3,3 ~ 4,1?[21 °C]

Removal

1. 1
   Turn the ignition switch OFF and disconnect the negative (-) battery terminal.
2. 2
   Disconnect the connector (A) and remove the sensor (B).

   Note that the SST (part number: 09392-2H100) is useful when removing the heated oxygen sensor.

   [Bank 1/Sensor 1]

   

   

   [Bank 1/Sensor 2]

   

   

Installation

Install the component with the specified torque. Note that internal damage may occur if the component is dropped. In this case, inspect it before use.

Do not use cleaner, spray, or lubricant on the sensing element or the sensor connector, as oil components in them may degrade sensor performance. The sensor and its wiring may be damaged if they contact the exhaust system (exhaust manifold, catalytic converter, etc.).

1. Install in the reverse order of removal. Heated oxygen sensor: 39.2 ~ 49 N·m