You're welcome, sometimes ideas are all we have. Most of them aren't very good, etc. lol.

But I wonder about it after seeing the photos of the big capacitor bank inside the main inverter housing. I'll try to find the link, it's here in the forum somewhere. As soon as I saw them I thought: "OK they're storing a non-negligible amount of current inside the inverter itself - to smooth out and "buffer" the instantaneous startup loads from the big electric motors, probably. So where do they get the power to keep those capacitors charged? Is it possible they have some kind of circuit that is directly connected to the HV battery and works totally independently of the key position? If the capacitors start to "flake out" and discharge, does the car automatically attempt to recharge them even when you're upstairs in your bed sleeping, thus discharging the HV battery but not necessarily throwing any codes, because it was designed that way?

Again it's here somewhere, big capacitors are living in there, in the engine compartment (cold/hot/vibrate/cold/hot/vibrate). I'll try to find it, it was a couple of months ago. This behavior you're documenting is strange and makes me wonder....

 

Here is the link, with the thread link:

https://www.atsg.us/atsg/blog/fordescapehybrid3/

Scroll down about half way and take a glimpse at the three big 450V 125A capacitors living in a housing under the Transmission Control Module.

In the thread with this post by "Lorne William Hengst"

https://electricvehicleforums.com/fo...90/index3.html

I'm wondering if those babies are automatically kept fully charged whenever needed, regardless of whether the car is running or not, and if there is a way for them to leak current without throwing a code?

 

Also, please let us know what the shop thinks when you have it looked at, I'm very interested to know. I realize the engineers try to think of all the possible contingencies on a system like this, but I wish we had "Super-Electricman" around for a day or two so he could sit and watch the current flows in the whole car with his "Electrovision" when the ignition switch is OFF and the key is removed.