Checking the heated oxygen sensor (HO2S)
- Ignition off
- Disconnect the connectors for the front (ECM-18) and rear (ECM-1C) heated oxygen sensor (HO2S).
Check the connectors for contact resistance and oxidation according to Contact resistance and oxidation .
Remedy as necessary.
Was a fault detected?
- YES
Refer to Verification
- NO
Refer to Checking the power cable