Component Testing
- Ignition OFF, disconnect the harness connector at the HO2S.
- Test for 3-23 ohms of resistance between the ignition 1 voltage circuit terminal 4 and the control circuit terminal.
- HO2S (EURO IV) control circuit terminal 2
- HO2S (Non EURO IV) control circuit terminal 3
- If not within the specified range, replace the HO2S sensor.