Oxygen Sensor: Service and Repair

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

Removal

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

1. Disconnect negative cable from battery.
2. Disconnect connector of A/F sensor and/or HO2S.
3. Remove exhaust manifold cover.
4. Remove A/F sensor (1) and/or HO2S (2).

Installation
Reverse removal procedure noting the following.
- Tighten A/F sensor (1) to specified torque.

Tightening torque
A/F sensor (a): 45 N.m (4.6 Kg-m, 33.5 lbf-ft)

- Tighten HO2S (2) to specified torque.

Tightening torque
HO2S (b): 45 N.m (4.6 Kg-m, 33.5 lbf-ft)







- After installation, check exhaust leakage from sensor with engine running.