Heated Oxygen Sensor (Ho2S) And Catalyst Monitor Sensor Removal/Installation - Hybrid: Removal/Installation

Fig 1: Identifying Heated Oxygen Sensor (HO2S) And Catalyst Monitor Sensor Components (Hybrid)

Courtesy of MAZDA MOTORS CORP.

Both Sensors 

1. With the vehicle in NEUTRAL, position it on a hoist. See LIFTING .
2. Disconnect the heated oxygen sensor (HO2S) and the catalyst monitor sensor (CMS) electrical connectors.

   HO2S 

   NOTE:

   • If necessary, lubricate the sensor threads with penetrating and lock lubricant to assist in removal.
3. Using the Exhaust Gas Oxygen Sensor Socket, remove the HO2S.
   • Calculate the correct torque wrench setting for the following torque.
   • To install, tighten to 48 N.m {4.9 kgf.m, 35 ft.lbf}.
     Fig 2: Identifying Exhaust Gas Oxygen Sensor Socket

     Courtesy of MAZDA MOTORS CORP.

   CMS 

   NOTE:

   • If necessary, lubricate the sensor threads with penetrating and lock lubricant to assist in removal.
4. Using the Exhaust Gas Oxygen Sensor Socket, remove the CMS.
   • Calculate the correct torque wrench setting for the following torque.
   • To install, tighten to 48 N.m {4.9 kgf.m, 35 ft.lbf}.
     Fig 3: Identifying Exhaust Gas Oxygen Sensor Socket

     Courtesy of MAZDA MOTORS CORP.

   Both sensors 

   NOTE:

   • Apply a light coat of anti-seize lubricant to the threads of the HO2S and the CMS.
5. To install, reverse the removal procedure.