Oxygen Sensor: Service and Repair

Removal

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

1) Disconnect negative cable from battery.
2) For sensor-2, remove console box.
3) Disconnect coupler of heated oxygen sensor and release its wire harness from clamps.
4) For sensor-2, Hoist vehicle.
5) For sensor-1, remove exhaust manifold cover.
6) Remove heated oxygen sensor from exhaust manifold or exhaust pipe.

Installation
Reverse removal procedure noting the following.
- Tighten heated oxygen sensor to specified torque.

Tightening Torque for heated oxygen sensor
(a): 45 Nm (4.5 kg-m, 32.5 lb-ft)

- Connect coupler of heated oxygen sensor and clamp wire harness securely.
- After installing heated oxygen sensor, start engine and check that no exhaust gas leakage exists.