I have having trouble with my vector calibrating my 935 and edge 520. I have added new battiers to both pods, switches the pods sides (swapped left and right) and reinstalled Vector software. Sometimes it gives me an Error code of 2 but most of the time it is -1. I cannot find the explanation of Error code -1 anywhere. On my 935 it does say both sides are connected.... just not calibrating.
Maybe it's a left pedal issue?