Heated Oxygen Sensor (HO2S), Replacing

Heated oxygen sensor (HO2S), replacing

Special tools:
999 5543 SOCKET NV-22 HO2S 999 5543 Socket NV-22 HO2S

Removal and Installation

Note! As the illustrations in this service information are used for different model years and / or models, some variation may occur. However, the essential information in the illustrations is always correct.

Removing the front heated oxygen sensor (HO2S)
Remove the heated oxygen sensor (HO2S) wiring from the clips and clamps.
Separate the wiring.
Raise the car

Remove:
- the lower engine cover
- the heated oxygen sensor (HO2S). Use tool 999 5543 SOCKET NV-22 HO2S 999 5543 Socket NV-22 HO2S.

Installing the front heated oxygen sensor (HO2S)
For tightening torques, see: Tightening torque Tightening Torque

Install:
- the front heated oxygen sensor (HO2S). Tighten to 45 Nm. Use tool 999 5543 SOCKET NV-22 HO2S 999 5543 Socket NV-22 HO2S
- the lower engine cover. Lower the car
- the wiring for the heated oxygen sensor (HO2S) using clips and clamps. Connect the wiring.

Removal and Installation

Removing the rear heated oxygen sensor (HO2S)




Raise the car.

Remove:
- the lower engine cover
- the front SIPS member. Unhook the brake pipe from the clips
- unhook the three-way catalytic converter (TWC) from the rubber mountings
- the nuts between the three-way catalytic converter (TWC) and exhaust system. Unhooks the three-way catalytic converter (TWC)
- the wiring for the heated oxygen sensor (HO2S) from the clips and clamps. Disconnect the wiring
- the rear probe. Use tool 999 5543 SOCKET NV-22 HO2S 999 5543 Socket NV-22 HO2S.

Installing the rear probe

Note! For tightening torques, see Tightening torque Tightening Torque.

Install:
- the rear heated oxygen sensor (HO2S). Tighten to 45 Nm. Use tool 999 5543 SOCKET NV-22 HO2S 999 5543 Socket NV-22 HO2S
- the wiring for the heated oxygen sensor (HO2S) in clips and clamps. Connect the wiring
- a new gasket and new nuts at the join between the three-way catalytic converter (TWC) and the exhaust system. Tighten to 24 Nm
- the rubber mounting for the three-way catalytic converter (TWC)
- the front SIPS member. Press the brake pipe into place in the member
- the lower engine cover.

Erase Diagnostic Trouble Codes (DTCs).

Reset trim.