Primary HO2S Replacement

Disconnect primary HO2S (Sensor 1) 4P connector (A).

Fig 1: Disconnecting Primary HO2S (Sensor 1) 4P Connector
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Remove the primary HO2S (Sensor 1) (B).

Fig 2: Removing Primary HO2S (Sensor 1) With Torque Specifications
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Install the primary HO2S (Sensor 1) in the reverse order of removal.