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 2 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.

   Specification: Refer to "Specifications"

Removal

1. 1
   Turn the ignition switch OFF and disconnect the negative (-) battery cable.
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 and 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. Installation is the reverse of removal. Heated oxygen sensor: 39.2 ~ 49 N·m