Tracker 2WD L4-1.6L VIN 6 (2000)
Catalytic Converter: Testing and Inspection
Catalyst Monitor (Good Catalyst)
Catalyst Monitor (Good Catalyst)
A good TWC catalyst will show a very active output voltage on the pre-catalyst heated oxygen sensor (1).
A good catalyst, 95 percent hydrocarbon conversion, will show a relatively flat output voltage on the post-catalyst heated oxygen sensor (2).
