C-Max Energi keeps discharging 12V battery because it thinks the car is trying to charge.

[kyledamron1]

So, this happened last month, where the car thought that it was charging, and would get stuck in a loop I think until it says "12V battery is low" and "Experienced a Fault while charging" and then the car goes dead.

We replaced the relay that acted like it was stuck on, but now it's done it again.

[kyledamron1]

Replacing the 12V battery seems to have solved the problem!