HO2S-1 and HO2S-2 Removal and Installation

Removal

CAUTION:

Touching exhaust system components when they are still hot may cause burns.

Check that the exhaust system has cooled down before removing the HO2S.

1)Disconnect negative (–) cable at battery.

2)Remove air cleaner assembly.

3)Disconnect connector of HO2S-1 or HO2S-2 and release its wire harness from clamps.

4)Perform the following steps before removing HO2S-1 or HO2S-2.

a)For HO2S-1, remove exhaust manifold cover, if necessary.

b)For HO2S-2, hoist vehicle.

5)Remove HO2S-1 (1) or HO2S-2 (2) from exhaust manifold.

Installation

Reverse removal procedure noting the following points.

•Tighten HO2S-1 (1) to specified torque.

Tightening torque

HO2S-1 (a): 45 N·m (4.6 kgf-m, 33.5 lbf-ft)

•Tighten HO2S-2 (2) to specified torque.

Tightening torque

HO2S-2 (b): 45 N·m (4.6 kgf-m, 33.5 lbf-ft)

•Use new clamp (3).

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