When Monitored
WARNING: This page is about a different car, the 2015 Fiat 500. However, it is still accessible from the selected car via links, so may be relevant.
This diagnostic runs when the following conditions are met:
- During O2 Sensor Heater operation after initial heater warm-up cycle.
- Battery voltage between 11.0 and 15.75 volts.
- No O2 Sensor circuit DTCs present.