MrBill -- regarding the "high amps" issue: I had exactly the same issues last year that you describe in your post above.
I ended up reflashing firmware, etc. to no avail. I was just about to post a description of my problems (had post already typed up), but before I hit the Submit button, I thought I'd check one more thing. I had already done some basic continuity checks of the DP-6 connector(s), and they 'passed'. But, thinking that 'bad wiring' had bitten me many times before in the world of electron travels, I went a bit further. I took apart the wiring harness between the CAv3's JST-SM6 (DP) connector, and guess what?
One of the wires (I forget which) had the multi-strand conductors broken *inside the outer insulation* layer, and 'mostly' they rubbed together and conducted. However, as you might guess, certain flexing of the whole assembly caused a *temporary* break in that conductor, causing a (random?) high current reading. I rewired the the section between the CA and the JST connector, using high-flex "silicone" wire (which I now use for all e-vehicle wiring), and ALL of these issues automagically disappeared.
Note: I have 3 CAv3's at my disposal, so I was able to 'divide and conquer' -- so my diagnosis wasn't totally a shot in the dark.