[g20beam]

Hi guys,

I have a problem that recently popped up on my car, after thorough research of the forums, I found no conclusive answer as to what this could be caused by.

There is an indicator in the dash (Not the CEL, just a little "i" towards the bottom middle of the dash) that displays a Battery Malfunction. When I click into it, it says Check Control, and underneath that, "Power Supply". It also says comfort functions will be partially limited (No clue what this means).

As far as I am concerned, this is persistent and has been for about a week now. However, the car still drives. I am not experiencing any Electronic failures besides my lower radiator shutter not opening and closing properly, which I think has to do with snow or ice since we just got hit by a couple of snowstorms this year.

I have called the dealership and booked in an appointment to figure out what's wrong, but if anyone here has any experience with this problem, please let me know what the issue could be.

[g20beam]

Since this post the indicator has gone away. I have no idea how it went away but I hope it stays this way.

If it comes back I will be sure to update this thread.

[VipinLJ]

I had something similar happen once. I think it was because of my dash cam. I had some stuff on the wind shield that kept my dash cam on all the time and that probably drained the battery. But it went away after I drove around.

[Rspade]

Originally Posted by g20beam

Since this post the indicator has gone away. I have no idea how it went away but I hope it stays this way.

If it comes back I will be sure to update this thread.

When you took car in to bmw what they say. Just had this peoblem

[romanovich]

Good evening,

My wife has a 2020 g20 and has been reliable for the most part. I recently got an error message that states battery malfunction. I pulled the codes and got

804415 - Radio remote control: Battery
undervoltage

030DA1 -Lithium ion battery: Communication falure in power management system
CB8C18- LN communication （dual
memory) Missing

I can’t seem to figure out what’s causing it? 2nd battery? Needs to be reprogrammed? Any help would be appreciated thanks!

[g20beam]

Originally Posted by romanovich

Good evening,

My wife has a 2020 g20 and has been reliable for the most part. I recently got an error message that states battery malfunction. I pulled the codes and got

804415 - Radio remote control: Battery
undervoltage

030DA1 -Lithium ion battery: Communication falure in power management system
CB8C18- LN communication （dual
memory) Missing

I can’t seem to figure out what’s causing it? 2nd battery? Needs to be reprogrammed? Any help would be appreciated thanks!

Condition it with a trickle charger, I figured out that this was the solution. The front battery gets drained and if it does not maintain a certain charge will cause errors.

Just hook up the front battery to a trickle charger overnight and it should all go away.