Visually/physically inspect the following conditions :

Exhaust system between HO2S and Three way catalyst for air leakage.

Damage, and for loose or missing hardware:

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 "Rear HO2S Inspection " procedure.

Visually/physically inspect the rear HO2S for the following conditions:

- Ensure that the HO2S is securely installed.(Pigtail and wiring harness not making contact with the exhaust pipe)

- Check for corrosion on terminals

- Check for terminal tension ( at the HO2S and at the PCM)

- Any road damage

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 "TWC Inspection " procedure

Visually/physically inspect the three-way catalyst(TWC) converter for the following damage:

- Severe discoloration caused by excessive temperature

- Dents and holes

- Internal rattle caused by a damaged catalyst

Also, ensure that the TWC is a proper original equipment manufacturer part.

Was a problem found?

YES

▶ Replace TWC and go to "Verification of Vehicle Repair" procedure

NO

▶ Check for poor connection between PCM and component: backed out terminal, improper mating, broken locks or poor terminal to wire connection. Repair as necessary and go to "Verification of Vehicle Repair" procedure