Set Condition
WARNING: This page is about a different car, the 2014 Fiat 500c and 2014 Fiat 500. However, it is still accessible from the selected car via links, so may be relevant.
The Powertrain Control Module (PCM) detects that the O2 Sensor Heater element input is above the maximum acceptable voltage. Two trip fault. Three good trips to turn off the MIL.