gearchruncher
Well-Known Member
There is more than one error and more than one response in the system. It appears that in newer firmware, for some errors, the car just stops using the 12V, and switches to the DC/DC ("PCS") fully. This means a dead 12V won't disable the car. However, what it does mean is the HV battery is engaged all the time, and you'll get very high vampire drain on the order of 5% per day (although this is just the same as having sentry on all the time).I'm assuming your not getting the 12 volt error code right now yes? If you do have that code popping up, as long as it will accept a reset you are never stranded. People get stranded only when the car has been showing the error for a while, meaning that the 12 volt subsystem is not getting charged and eventually the 12 volt drains down to zero.
It's a good idea to try and reset and get the message to go away.