By the way, this is a copy of an email I received from DIYAutotune when I was, still am, battling an electrical problem. Hope it can help.
The red lines can have a couple different meanings. If the SecL drops to
zero immediately afterwards, it's a processor reset. As the processor
checks the MAP sensor for barometric correction immediately after the
reset, this will affect fueling.
If SecL keeps on ticking like it was, you've had a communications
dropout. Annoying but won't affect the car's operation.
EDIT: Now just like you eneabled vBatt, enable the Baro correction so you can view any corrections.