Visual/Physical Inspection
- Visually/physically inspect the following items:
- Check for corrosion on terminals
- Check for terminal tension (at the HO2S and at the PCM/ECM)
- Check for damaged wiring
- Check the HO2S ground circuit for a good connection
- Check front and rear HO2S for connections being reversed
- Was a problem found in any of the above areas?
YES
- Repair as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure.
NO
- Go to "Component Inspection" below.