Check Oxygen Sensor
NOTE:
This check must be performed with the engine cold.
- Remove oxygen sensor connector 2 ahead to TWC.
- Connect ohmmeter to pins 1 and 3 of the oxygen sensor connector towards the oxygen sensor.
Display: infinity ohms
- Connect ohmmeter to pins 2 and 3 of the oxygen sensor connector towards the oxygen sensor.
Display: infinity ohms
- Connect ohmmeter to pins 1 and 4 of the oxygen sensor connector towards the oxygen sensor.
Display: infinity ohms
- Connect ohmmeter to pins 2 and 4 of the oxygen sensor connector towards the oxygen sensor.
Display: infinity ohms