So I'm an idiot. I used our 2015 i3 REX with 14k miles to power an air compressor to blow up some pool floats over the weekend. I did not start the car completely, I left it in accessory mode (or whatever). I noticed the "Excessive Battery Discharging While Parked" error close to the end of using the compressor so I did start the car all the way. I then locked the car and went about my business. Monday morning on the way to work I noticed the auto open lock didn't work when I grabbed the handle, the unlock button on the key worked fine. I of course then got the same error when starting the car. I googled the issue and couldn't find much about recharging the battery, lots about replacing it. Oh and I HAD NO IDEA the i3 had a 12volt battery!!! Seems odd to me hat an electric car would need one. I did find a BMW service bulletin that appeared to say the fast charger would recharge the 12volt. So I've been plugging the car in every night when I get home (use about 12-15 miles electric range daily) and am still getting the error. No issues yet with starting or driving the car but I'm concerned about long term problems.
Does the 12v battery need replacement? Or Will it eventually recharge?
Is there a way to tell if the 12v is being charged by the main battery (which i understand is the process)?
Is there a way to see the charge level of the 12v?
I used Bimmercode to enable the full gas tank and a few minor tweaks (decrease lock beep volume etc.) a few months ago, so not sure if that's a problem?
Any advice would be much appreciated!
2015 i3 Rex, Solar Orange Metallic, Tera World, Technology & Driving Assistant, Parking Assistant, 19 inch 428 wheels