Report back if it happens again. I doubt that will fix it, but it might have reset something temporarily.
DTCs will usually clear with a battery pull but that doesn't mean the problem is resolved. Mine has come and gone randomly a couple times a month. It'll be fine for weeks at a time.
A persistent error would not have cleared or at the very least it would have come back shortly after power was reconnected. If the HVBJB was shorted or frozen open, the car’s systems would have detected those issues and reported DTCs for one or the other after it was powered up again. I suspect your error was due to something else, perhaps the Ford Mobile Garbage… err… Ford Mobile Charger. ??
Interestingly enough the next time I went to charge the car after getting and clearing the SSN error, the FMC wouldn't charge on L2. The charger would reset (red LED flashed once) a few seconds after the coolant pump turned on and start the cycle again. Switched to L1 and it started to charge. Switched back to L2 and it worked
. No DTCs and no SSN errors this time. It was -3C out but the car had just finished driving 100km so it shouldn't have been that cold.
If you have alternatives, find a different dealer. My dealer replaced my 12V battery for a little over $200. The HVJB is covered by the 8 year/100k mile warranty, but the 12V battery is a consumable, so it will be difficult to get Ford to cover that. You should have a decent argument for getting the tow covered though, I think...
