Celica Liftback L4-122 1998cc 2.0L DOHC Turbo (3S-GTE) (1992)
Catalytic Converter: Testing and Inspection
If exhaust system back-pressure and/or exhaust emission levels are excessive, remove the catalytic converter from the car and make a visual check for
plugged, melted or cracked ceramic grid inside. If any of the visible areas are damaged, replace the catalytic converter. Inspect sub three-way catalytic
converter in the same manner as main TWC.