When Monitored

WARNING: This page is about a different car, the 2024 Jeep Grand Cherokee L. 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.
Battery voltage between 11.0 and 15.75 volts.
No Ambient Air Temperature Sensor faults set.
And any one of the following is true:
- Engine coolant temperature at start up is above 7°C (44.6°F).
- Ambient temperature is above 7°C (44.6°F).
- The difference between engine coolant temperature and ambient temperature is greater than 9°C (16.2°F) at engine start.
- The O2 Sensor heater temperature is greater than 401°C (753.8°F) for more than 20.0 seconds.