When Monitored
WARNING: This page is about a different variant/trim than selected.
This diagnostic runs when the following conditions are met:
- No other O2 Sensor circuit faults active.
- There are several different catalyst efficiency monitoring windows. Each specific window has several different enable conditions. The best opportunity for the catalyst efficiency monitor to run is:
- Engine temperature above 70°C (158°F).
- Engine speed between approximately 1000 rpm and 3000 rpm.
- Vehicle speed between 20 mph and 85 mph, under moderate engine load.