Heated Oxygen Sensor Replacement. Geo Prizm 1997

For 1990-2009 cars

### Removal Procedure

Important: The HO2S may be difficult to remove at temperatures above 48°C (120°F). Allow the engine to cool down before attempting to remove the HO2S. Use care in order to prevent any damage to the threads in the exhaust pipe.

1. Pull back the passenger side carpet from along the console floor area.
2. Disconnect the HO2S 2 electrical connector (1).
3. Remove the HO2S wiring from under the floor heat duct.
4. Raise and suitably support the vehicle. Refer to in General Information.
5. Remove the wiring and the body plug (2) from the floor pan.
6. Remove the HO2S 2 (3) from the exhaust pipe.

### Installation Procedure

Important: The HO2S 2 comes with an anti-seize coating on the new sensor. Take precautions in order to prevent removal of any of this coating prior to installation.

1. Install the HO2S 2 (3) into the exhaust pipe.
2. Tighten the HO2S 2.

Tighten
Tighten the HO2S 2 to 44 N·m (32 lb ft).

3. Install the wiring and the body plug (2) into the floor pan.
4. Lower the vehicle.
5. Pass the HO2S wiring under the heater floor duct.
6. Connect the HO2S 2 electrical connector (1).
7. Install the passenger side carpet back along the console area.