Originally Posted by
pioneer4x4
At time 377.2, notice how both bank 1 O2 sensors go to 0V, you might have a ground issue, or a short to ground issue. Just a guess, but I have seen an engine harness rub through and cause issues only under full access when it rubbed a certain way, but looked fine under the hood parked.
A weird ground issue may also explain the other sensor going weird. But as you mentioned Bluetooth OBD2 isn't perfect either.
when I opened the fuse box it looked like a rats nest.. I guess the dealer was looking over each wire for the short or maybe a loose ground.