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 PCM)

- Check for damaged wiring.

- Check the HO2S ground circuit for a good connection.

Was a problem found in any of the above areas?

	▶ Repair as necessary and go to "Verification of vehicle Repair" procedure.
	▶ Carefully re-do this troubleshooting guide steps. ▶ If no problems were found with the circuits or connectors, replace the HO2S(S2) and go to "Verification of Vehicle Repair" procedure.