Hopefully they added HT12 and not generic coolant.
In regards to the error -- Everyone'll get it with enough heat and aggressive driving. I've had to top mine off a few times during track days (Distilled water)
All you need to do is disconnect the connector at the pump, and you'll have room to twist the coilpack (rearmost) out of it's hole. Just don't forget to reconnect the connector.
Went to roebling for my first time. Got to share the paddock with @Traxion and his friends. Super rad people. Also learned new driving techniques.
It was quite greasy, but I had a great time there.
Because this is a recent development that has been resolved by a really *really* smart dude. It's not something that's recommended to all, as it’s still in testing.