I am also having the exact same two error codes that do not clear:
B2840 962E CHARGER On Board Charger
P3173 00C0 EV/HEV On Board Charger Sys
My 2012 Leaf with 88k miles throws a fault on the trickle charger and will not charge on it or our L2 First Gen JuiceBox. When I plug it in, it beeps once for the proximity, but no lights illuminate, and the OBC does not make any noise.
The car will still drive, but I am rationing those miles to drive a little every few days so that the car doesn’t sit static indefinitely. We live in Mississippi and the nearest Nissan dealer won’t touch it, and our nearest Leaf dealer hasn’t ever seen anything like this, and is well out of range, even if it had a full charge. The amber EV Warning light on the dash is illuminated, and if I’m being embarrassingly honest, has been for months, but I was too cheap to buy Leaf Spy Pro for my unactivated Android phone until recently.
As I rack my brain for anything that could be related: the charge cord has ran under our garage door for years, and while we have kept a block next to it to keep the door from crushing it, I wonder if it’s related. Originally, I could get the amber EV warning light to go away by plugging it into the Nissan L1 trickle charger, But it eventually would come back after L2 charging. A few months back, after I plugged it in with the L2 charger, I wiggled the cord and it stopped charging and then started again. I don’t believe it’s happened more than once, but remains possible it’s related.
Again, now neither my L2 charger nor the L1 charger that came with the car originally will get more than a proximity beep when plugged into the LEAF.
I am used to working on my ICE vehicles, and feel like the service manuals give me enough information to change out the charger if necessary. My biggest concern is that 400 V is significant, and I have to convince my wife to let me work on it. While I would like to believe that my issues are related to the “diode“ issues others have talked about, it seems like there are more layers to these codes, which might actually necessitate replacing or at least removing the whole charger.
2012 LEAF (White) - Purchased in 11/14
2010 Rogue (Black)
1987 BMW 325i (Red)