Oxygen Sensor: Testing and Inspection

Oxygen Sensor Heater Circuit Inspection

1. Ensure tat the ignition switch is OFF.
2. Disconnect the heated oxygen sensor connector from the wire harness.





3. Connect an ohmmeter between terminals 1 and 3 of the connector and measure the resistance.

Resistance: Approximately 6ohms 68°F (20°C)

4. If not as specified, replace the heated oxygen sensor (see below).
5. Also check wire hamess for continuity.
1.6 Liter B6 DOHC: Between pin 4 in C179 and pin 14 in C254.
6. If continuity is not correct, check wiring for opens.