So I recently had some recall work done (software) related to the ICCU on my '22 I5 AWD SE, and over the weekend I woke up to a dead 12V battery, despite having the main battery at >60%. I charged up the 12 battery at home with a trickle charge while doing some research. Come to find out, this recall was initiated just days ago.
Now, I have a 'full' 12V battery but I am a bit afraid to drive the car (even to the service station) for fear that I will lose power in an unsafe situation. (I live in SoCal so driving is pretty intense even when all the cars are functioning properly).
I have had significant ICCU issues with this vehicle in the past. ICCU was fried when I took delivery, then got repaired/replaced. After that it still wouldn't L2 charge at full speed so I just lived with that since I charge overnight anyway. (L3 was always fine).
Q: is there any prospect of losing drive power if I monitor and charge the 12V while waiting for my service appointment? Eg do I need a tow?
I'm also trying to decide how hard I need to press for a loaner vehicle in a situation where they don't seem to want to give it to me without pushing (at least not until I get my service appointment and they can check out the car). Getting a rental on my own dime would set me back a few hundred $ at least and this feels like it should be Hyundai's responsibility.