Oxygen Sensor: Service and Repair

Air Fuel Ratio (A/F) Sensor, Heated Oxygen Sensor (HO2S) Removal and Installation

Reference: Air Fuel Ratio (A/F) Sensor On-Vehicle Inspection
Reference: Heated Oxygen Sensor (HO2S) Heater On-Vehicle Inspection

Removal

WARNING: To avoid danger of being burned, do not touch exhaust system when system is hot. A/F sensor and/or HO2S removal should be performed when system is cool.

1. Disconnect negative cable at battery.
2. Disconnect connector of A/F sensor and/or HO2S.
3. Remove A/F sensor (1) and/or HO2S (2) from exhaust No.1 pipe.

Installation

Reverse removal procedure noting the following.




^ Tighten A/F sensor (1) to specified torque.

Tightening torque
A/F sensor (a): 45 Nm (4.5 kg.m, 32.5 ft. lbs.)

^ Tighten HO2S (2) to specified torque.

Tightening torque
HO2S (b): 45 Nm (4.5 kg.m, 32.5 ft. lbs.)