REMOVAL
1/1 UPSTREAM
1. Remove the engine cover.
2. Remove the negative battery cable.
3. Disconnect electrical connector from O2 sensor.
4. Remove sensor using an oxygen sensor crow foot wrench such as Snap-On tool YA8875 or equivalent.
1/2 DOWNSTREAM
The downstream heated oxygen sensor threads into the catalytic convertor.
1. Remove the negative battery cable.
2. Raise vehicle and support.
3. Disconnect electrical connector from sensor.
4. Disconnect sensor electrical harness from clips along body.
5. Remove sensor using an oxygen sensor crow foot wrench such as Snap-On tool YA8875 or equivalent.