Visual/Physical Inspection
- Visually/physically inspect the following items:
- Ensure that the HO2S is securely installed.
- Check for corrosion on terminals.
- Check for terminal tension (at the HO2S and at the ECM).
- Check for damaged wiring.
- Check the HO2S ground circuit for a good connection.
- Check front and rear HO2S for connections being reversed. If HO2S connections reversed, switch connections properly.
- 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 "EXHAUST SYSTEM INSPECTION " procedure.