When Monitored
WARNING: This page is about a different car, the 2015 RAM 3500 HD and 2015 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.
This diagnostic runs when the following conditions are met:
- With the engine running.
- Vehicle speed above 96 km/h (60 mph).
- ECT greater than 70°C (158°F).
- Throttle open for a minimum of 120 seconds.
- Catalytic Converter temperature greater than 600°C (1112°F).
- Downstream O2 Sensor in a rich state.
- During a decel fuel shutoff event, the Downstream Oxygen Sensor should switch from rich to lean within a specific time.