Check Three-way Catalyst

Perform a visual/physical check for the following items.
- Discoloration due to overheating
- Deformation or holes
- Noise due to internal damage to the catalyst
- Whether the use of genuine
Has a problem found in this procedure?
YES
- Repair as necessary and go to "VERIFICATION OF REPAIR " procedure.
NO
- Go to "CHECK THE HO2S " procedure.