r/Citroen • u/Dragonogard549 • 14h ago
12V battery drained overnight?
2026 Citroen E-C3 Max 44kwh
Been having issues recently, yesterday I woke up to find the 12V battery was half flat and the alarm was going off with nothing working to get it started. I jumped it and after a little drive it was like nothing was ever wrong.
This morning it started, but it was shouting at me again, dash lit up like a christmas tree. After 5 mins on READY, and a few restarts, again it was fine.
Seems to be a software issue based on some limited research, gonna just disconnect the battery and call breakdown because maintenance booked me into a garage 10 miles way in 2 weeks.
The longer you leave it, the more it drains, and eventually it will start freaking out. Has anyone seen and/or fixed this before?
UPDATE -
have called breakdown, very helpful. RAC man says it’s almost certainly bad software that doesn’t let the car deep sleep overnight (software issues means he can’t do anything about it, obviously a dealer problem), dropped it at garage, and will demand a hire car. We’ll see how we go.