1C
Heated Oxygen Sensor (HO2S-1 and HO2S-2) Removal and Installation
Reference: Heated Oxygen Sensor (HO2S-1 and HO2S-2) Heater On-Vehicle Inspection:M13A
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 at battery.
2) For HO2S-1, remove exhaust manifold cover (1) and disconnect connector of heated oxygen sensor and release its wire harness from clamps.
3) For HO2S-2 disconnect connector of heated oxygen sensor and release its wire harness from clamp.
Hoist vehicle and then remove exhaust No.1 pipe covers (3).
4) Remove heated oxygen sensor (2) from exhaust manifold or exhaust No.1 pipe.
[A]: HO2S-1
[B]: HO2S-2
Installation
Reverse removal procedure noting the following.
• Tighten heated oxygen sensor (2) to specified torque.
Tightening torque
Heated oxygen sensor ( a ): 45 N·m ( 4.5 kg-m, 32.5 lb-ft)
• Connect connector of heated oxygen sensor (2) and clamp wire harness securely.
• After installing heated oxygen sensor (2), start engine and check that no exhaust gas leakage exists.
[A]: HO2S-1
[B]: HO2S-2