Oxygen Sensor: Service and Repair

Heated Oxygen Sensor (HO2S) Removal and Installation

NOTE: For identification of each cylinder and bank, refer to Precaution for Identification of Cylinder and Bank:N32A.

Removal

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

1. Disconnect negative cable from battery.
2. Disconnect connectors of HO2S.
3. Remove HO2S (1) from exhaust manifolds.

Installation
Reverse removal procedure noting the following.
- Tighten HO2S (1) to specified torque.

Tightening torque
HO2S (a): 45 N.m (4.5 Kg-m, 33.5 lbf-ft)
















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