Catalyst Monitor Execution
WARNING: This page is about a different variant/trim than selected.
Catalyst monitor execution is once per drive cycle. Typical monitor duration is 10-20 seconds. In order for the catalyst monitor to run, the HO2S monitor must be complete and the EVAP system functional with no stored DTCs. If the catalyst monitor does not complete during a particular drive cycle, the already accumulated switch/signal data is retained in the KAM and is used during the next drive cycle to allow the catalyst monitor a better opportunity to complete.