TheVerge

Finally got my car back from the dealership, after about 3 weeks. When I took it there, they gathered all data from the car and sent it to the distributor here in the Netherlands. I am not an expert and I am not sure whether I use the correct jargon, but it was advised to replace the "major control unit". That seems to be some sort of gateway handling all data through the entire car. They couldn't get this new unit working. There were issues programming it. They finally decided to get another new control unit. That one worked flawless immediately. It appears that the first replacement unit was already defective. At that point there was a new issue revealed. The control unit for the 12V battery reported issues. They have repleaced that part and there were no more issues reported by the car. Now, they suspect that the 12V battery control unit has always been defective and causing my problems. Also, it appears that there is a software fix available for the rear lights turning on randomly when parked. According to the mechanic that fix was applied to my car when they programmed my major control unit. Due to the lockdown situation over here, I have not driven my car much. I guess we just have to wait and see if the issue with the flat 12V battery is finally solved now.

Hi! I don't think charging the car or not makes a difference. My 12V battery went flat in both situations.

Having the exact same problems with my Octavia Combi iV. Flat 12V battery several times in the first month after delivery, February 2021. Dealership replaced the steering wheel as that seemed to produce amber lighted warnings on the virtual dash (e.g Parking brake not available, front assist warnings, etcetera). That seemed to have helped. Had no more issues with the battery. Until today. 12v battery was flat again. The car is now at the dealership again. Now, I do suspect the steeringwheel heating. That option was setup to start depending on the outside temperature. It is getting colder now, so heating starts when I start the car and I've noticed these strange warnings started coming back again. Do you also have steeringwheel heating? I also have the issue of the backlights turning randomly when parked. So has my neighbour with his Octavia Combi iV. Not sure if this is linked to the flat battery issue as I saw this several times and had no issue with the 12V battery after that. I hope the issue can be solved soon as the car is now very unreliable to me. Fingers crossed.