Tracker 2WD L4-1.6L VIN 6 (2000)
Catalytic Converter: Testing and Inspection
Catalyst Monitor (Bad Catalyst)
Catalyst Monitor (Bad Catalyst)
A degraded, or bad, TWC catalyst, 65 percent hydrocarbon conversion, will show greatly increased activity in the output voltage from the post-catalyst
heated oxygen sensor (2). The degraded catalyst post-catalyst HO2S output voltage will therefore appear similar to the typically active output voltage of
the pre-catalyst heated oxygen sensor (1).
