Red Triangle

Don't go on a trip with this car!

Disconnecting the 12v reset the car, but it didn't fix your problem. You don't want to be far from home when those lights return.

Do not buy refurbished, your car is low mileage so you should buy new

 

Since you never actually read the codes, you have no idea what the problem is. Could be misfiring for all we know and have zero to do with the battery.

If you have an OBDII scanner and a phone (with an app like Torque) or a laptop (with a program like Techstream) then you can see what's up. There aren't shortcuts to this and you need to buy something like this now that the car has told you it's hurting.

If it was the battery, I'd actually be OK with taking it on a trip. Highway driving keeps the battery happy. And usually after the code is thrown for the very first time, you've got a bit of time before it becomes persistent. This car should now be treated as though it could strand you at anytime anywhere until you have fixed the problem. If you are doing medical trips to the hospital, go rent a car. If you are OK with the possibility of the car throwing a code and stalling on the side of the road and needing to wait hours for a tow, then I'd continue driving the car short term with heightened awareness. Assuming it is the HV battery, minimize using it. Don't reverse, ever if you can. Otherwise reverse in at the end of your trips so you can just go when you READY the car and not have to reverse. Try to not let the engine turn off. Crank the heat or just highway drive so it stays on. In the city, force charge at lights. No creep on electric only. No jackrabbit starts. You could survive a while.... maybe.

As to a refurbished pack, just say no.

 

The hardest part is removing the pack assembly from the vehicle and then putting it back in. It's just shy of 100lbs, a little bit awkward, and has sharp edges. You have no good lifting point, you'll be hunched over it. If you can do that, or recruit some muscle to help the rest is trivial. You will be playing with high voltage DC so take it slow and safe unless you want to fry yourself. Remember being electrocuted by high voltage AC gives you 60 times a second to let go. Being electrocuted by high voltage DC, you just clamp harder and harder until you die.

 

I can't speak to Auto Doctor, but Torque is able to read all the codes from all the ecus. A persistent RToD means there's a code. A flash of one could be something as benign as the door sensor thinking the door is open while moving.

I use TechStream for real diagnosis, Torque just to read a code on the go and maybe clear it. May be a good idea to get a TechStream laptop ready for the next time this happens.

 

Sounds like you have the required experience to not warrant the common "if you have to ask, don't do this as you may kill yourself" response. Put on some certified 1000v gloves and go to town. Not so scary.