Kia EV6 GT: Alarm nach 1–2 Minuten, häufiges Nachladen der 12V-Batterie und bis zu 4 % HV-Verlust über Nacht

Bazz · Vor 3 Stunden

Hello everyone,

I'd like to start a new thread because my Kia EV6 GT has a persistent problem. Perhaps someone has experienced something similar and found a specific cause or solution.

The vehicle originates from the USA and is currently being used in Tbilisi, Georgia.

Here's what happens:

• After switching off and locking the vehicle, it takes about 1–2 minutes for the alarm to trigger for no apparent reason. The car horn sounds and the hazard lights flash. The alarm stops after a while, but then triggers again. This repeats throughout the night.

• If I leave the vehicle unlocked, the alarm remains off. However, the 12V battery continues to discharge and the high-voltage battery repeatedly recharges.

• The 12V battery is repeatedly recharged from the high-voltage battery during the night. As a result, the high-voltage battery loses up to approximately 4 percentage points overnight.

I therefore suspect that one or more control units are not entering sleep mode after being switched off, or are being repeatedly woken up. However, this is only a suspicion so far; the responsible circuit or control unit has not yet been identified.

Already checked or ruled out:

• Kia Connect is deactivated in the vehicle.

• There are no retrofitted devices or accessories installed – no additional alarm system, no tracker, no dashcam, etc.

• The 12V battery was checked and has already been replaced. The behavior remained unchanged.

• Doors, hood and tailgate including the locking contacts were checked.

• The indoor monitoring system was ruled out as the cause.

• No error codes were found during the diagnosis at the Kia service center.

It is particularly noticeable that the increased energy consumption persists even when the vehicle is unlocked. The alarm system alone therefore cannot explain the entire consumption.

Has anyone else experienced this combination of repeated false alarms, frequent recharging of the 12V battery, and increased power consumption when the vehicle is switched off?

If the problem has been resolved for you: What was the specific cause and which repair helped? The name of the affected control unit or component, a part number, a software version, or details of how the workshop found the fault would be particularly helpful.

Thank you so much for sharing your experiences and advice!

**HeavyDad** · 2026-10-23T09:36:51+02:00

Hallo, da in Deutschland der EV6 meines Wissens nach nicht mit Ultraschall Innenraum Überwachung ausgeliefert wird kann Dir hier wahrscheinlich keiner so richtig weiterhelfen helfen. Aber wenn die Alarmanlage ständig auslöst würde ich doch eher was in dem Stromkreis vermuten, evtl auch Kurzschluss oder Kriechströme. Was passiert denn wenn Du die Sicherung der Alarmanlage ziehst ändert sich der Stromverbrauch? Ich würde ja echt mal den Stromverbrauch laufend messen und nach und nach eine Sicherung nach der anderen ziehen um das einzugrenzen. Klassische Fehlersuche halt. (Leider mit Google übersetzt, so fluend ist mein Englisch dann doch nicht)

Hello.

As far as I am aware, the EV6 is not delivered with an ultrasonic interior monitoring system in Germany, so it is unlikely that anyone here will be able to provide a definitive answer. However, if the alarm system keeps going off, I would suspect an issue within the electrical circuit—possibly a short circuit or a parasitic current leak. What happens if you pull the fuse for the alarm system; does the power consumption change? I would recommend continuously monitoring the power consumption while pulling fuses one by one to narrow down the source of the problem—standard troubleshooting, really. (Apologies, this was translated using Google; my English isn't quite fluent enough for this!)

KiaEV · Vor 9 Minuten

Hallo,

hast du vielleicht eine Fehlermeldung in der KIA-App !

Hatte auch schon Alarme ohne erkennbaren Grund. In der APP-Meldung tauchte dann der Rücksitz Alarm auf. Dieser hat nach verschließen des Fahrzeugs dort noch ein Gewicht bemerkt und auf eine (nicht) eingeschlossene Person reagiert.

Hello,

Do you happen to see an error message in the Kia app?

I’ve also had alarms go off for no apparent reason. In those cases, the app notification indicated a "rear seat alert." It had detected weight in the back seat after the vehicle was locked, triggering an alert as if a person had been left inside.