Three-way catalytic converter check

Perform visual inspection.
- Check the air leakage between the HO2S and the catalytic converter in the exhaust system
- Check for damage and misplacement.
  Good
  - Fault is intermittent caused by poor contact in the sensor's and/or ECM's connector or was repaired and ECM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and Go to "VERIFICATION OF REPAIR " procedure.
  No Good
  - Carefully re-do this troubleshooting guide steps.
  - If no problems were found with the circuits or connectors, replace the HO2S or catalytic converter and Go to "VERIFICATION OF REPAIR " procedure.