Rear Oxygen Sensor Test

Downstream Oxygen Sensor Location:

1. Disconnect the heated oxygen sensor connector.





2. Make sure that there is continuity [approx. 12 ohms at 20°C (68°F)] between terminal 3 and terminal 4 on the heated oxygen sensor connector.
3. If there is no continuity, replace the heated oxygen sensor.

NOTE: If the scan tool does not display the standard value although no abnormality is found by the above mentioned continuity test and harness check, replace the heated oxygen sensor (rear).