Well, dealer called yesterday AM that the 12v battery "didn't have enough CCA" and thus needed replacement. I laughed, and the service guy did actually immediately reply that he did know that a Leaf doesn't crank, but their battery tester gives them good versus bad in CCA so that's got to be replaced first. Since the 12vbattery was installed 6/2016 at factory, I figured it was not worth arguing about and told them to replace. Besides, they charge a $129 diagnostic fee, and if you refuse their "repair" they make you pay the diagnostic fee. If you accept the repair, they waive the fee. So $170 for a new battery. I figured fighting it would cost me $129. So I figure I sort of got a new 12v battery for $41....... Feels better that way.....
The car had a ton of error codes on arrival to the dealer, which they did write down for me, but they felt these were due to low 12v battery. They *may* be right.
They then charged the traction batter over night and test drove today. They could not get any of the errors or turtle events that I was getting. Problem is, in the meantime, since Jan7, Kansas City is roughly 40 deg warmer! Traction batter showing 5 bars temp. So I am not sure if the 12v battery fixed the problem or not. I drove the Leaf hard this afternoon and could not replicate either.
I think they *may* be right. The errors occured under accelleration or incline or high speed. Usually combo of 2 or three of the above. I wonder if the Leaf shuts down the 12v inverter that charges the 12v system, when the traction battery is being heavily burdened? Then, if the 12v battery is reaching the end of its days, the 12v voltage would drop and eventually cause all manner of error codes. That's a possible scenario I think.
But this being Kansas City in January, I will have cold weather again in time. I'll see if I can replicate then and if not, then the dealer was probably correct.....
2016 SV 30kwh >> 40kwh 3/42022, 2014 Blue Prius, 2011 Silver Prius, 2005 Subaru Forester X, 1965 F-100
8.1KW GridTie Solar
Sold 2012 SL 42k miles, 10 bars, 12/15/16 for $5999 (cannot believe I did that)
Kansas City MO