Terminal 30fg getting cutoff

[Aegon]

Hi everyone

I've had this issue for a while now and I want to sell it, so you know it would be better to get all fault codes solved.

Model 2009 328i

Aftermarket hid for low beam and fog lights

Replaced turn signals and angel eyes with LEDs

Well the main symptom is the clock being reset everytime I start the car. Which leads me to the terminal 30fg being turned off because the battery gets the juice drained to critical levels.

The car shows 12.5 v while running and 11.2v with engine turned off.

What should I do from here?

Error codes

Engine
2F71
2A87
2F80
2DED

BODY
9CBD
PCBC
A8AA LEFT headlamp turns itself off randomly

Thanks in advance to all

[White94RX]

How old is the battery? The first thing I'd do is replace it, register it (the single most important step), then clear all fault codes and see what happens. You should see about 12.5 with the engine off, and over 13 with the engine running.

[cheech1]

11.2 volts, and the starter still turns?
Sounds like your alternator has gone bad, as 12.5 volts while running is too low.
These cars have all kinds of issues with a week battery.