You will know real quick if your DC converter is not working, you 12V will be dead within few hours. Personally I think it's something else, did this error show up when plugged into a charger, or while driving?On a 2018 model S, does this error mean the 12v voltage or main pack voltage is to low?
I suspect DC converter is not working. How do I check it’s fuses? I can’t find them anywhere.
I had this on a rental X in January. It subsequently stranded me and they had to come tow the vehicle. The 12v battery needed replacing.
Have you proactively replaced you emmc or MCU for the same reason?Which is a good reason to proactively replace battery(not on rental). Another member recently chided my about replacing a "good" battery that had nothing wrong with it. Car has 100k miles. In the middle of nowhere I often find myself. Don't like to add the words stranded to that.
Have you proactively replaced you emmc or MCU for the same reason?
With Tesla's updates trying to keep batteries from dying and/or catching on fire, my 2015 MS is running battery coolant pumps almost around the clock (in 70F degree weather my batteries are kept so cold that my regen is limited when I start driving!). Those pumps run from 12V battery and suck decent amount of power. That will exercise both the 12V battery and the DC-DC converter. Added stress will speed up wear, so more likely to push already aging components to failure. Up next, a surge of coolant pumps failing.Must be a thing. Just got this low voltage error today. Car has not been driven in weeks. Noticed a car will not start error some time ago, which cleared. Then, high vampire drain and SMT showed the 12v being drained. Proactively changed the 12v, old battery tested and showed 33% loss of capacity. Everything was fine for a day, then the new batt started to get drained. Put it on a charger and still got errors, plus the low voltage, even though 12v on 10A charge, and 12.8v at the accessory socket.
Guessing the DC-DC converter is going which I guess means pulling the HV pack. Not happy on this low mileage, babied car.
Aha! I think I just figured out Elon's plan here. People complained about capping battery range so that Tesla can avoid the 8 year warranty obligations, so instead Elon found a way to push the wear to non-warrantied parts. Basically, instead of capping you, you are presented with a choice, cap your own range or else the car will wear out the pumps, the contactors, and the DC-DC converter - none of which are part of the 8 year warranty. This also indirectly reduces your range since it increases the vampire drain, but guess what, vampire drain was never warrantied as part of battery degradation. As long as the battery charges to some % of original capacity, the fact that the car will chew through however many miles a day of that range running the cooling pumps is not considered battery degradation (even though indirectly caused by battery needing to be cooled so much).I won't charge above 78% unless I have too, to avoid wear on the pumps
Until the mothership finds you...