MarkCoburn
Posts: 9
Joined: Sun Oct 02, 2016 5:27 pm
Delivery Date: 26 Sep 2016
Leaf Number: 408114

2020 57k Miles Failed Cell Warranty Advice CVLI Test

I've got a 2020 non-plus 40kWh with a failed cell.

We have a bit of an up-hill to our house. A couple days ago, I was driving home with 56% SOC. When we hit the incline, the SOC dropped like a rock, started giving low charge warnings, and went into turtle mode. That was all in the span of less than two miles at about 40-50 MPH. When I pulled into the driveway, just sitting in park, the SOC climbed back up to >50%.

I was able to repeat the issue on video. A day or so later, I took it on the highway. One minute I have 99 miles of range and the next I'm at zero.

Discussions on this forums confirmed to me that this is a battery issue and that I should seek a warranty fix. I was hopint that the community would collaborate on some advice of how to reach out to the dealers and what to expect. I was planning on contacting a couple of them and try to get a sense of who might be best to trust this issue with.

Hopefully you all han help guide me through a good warranty experience and that can be shared here for others.

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Last edited by MarkCoburn on Wed Sep 27, 2023 8:26 am, edited 2 times in total.
cwerdna
Posts: 13579
Joined: Fri Jun 03, 2011 4:31 pm
Delivery Date: 28 Jul 2013
Location: SF Bay Area, CA

Re: 2020 57k Miles Failed Cell Warranty Advice

That's a MASSIVE delta for such a high SoC.

You'll need the dealer to do a CVLI test but for the 40 kWh pack. Google for site:mynissanleaf.com cvli. The voltage may be different than listed at https://www.mynissanleaf.com/viewtopic.php?t=16070 since that was for the 24 kWh pack w/different cells.

'22 Niro EV
'19 Bolt Premier (bought back by GM)
'13 Leaf SV w/premium (former)
'13 Leaf SV w/QC + LED & premium (lease over)

Please don't PM me with Leaf questions. Just post in the topic that seems most appropriate.
MarkCoburn
Posts: 9
Joined: Sun Oct 02, 2016 5:27 pm
Delivery Date: 26 Sep 2016
Leaf Number: 408114

Re: 2020 57k Miles Failed Cell Warranty Advice

cwerdna wrote: Tue Sep 26, 2023 11:55 pmYou'll need the dealer to do a CVLI test
Thanks for the reply. Good info. Sounds like my issue might be more novel that I thought.

Is there any experience of how to best choose what dealership to work with? I'm on the west side of Portland, Oregon. There are at least 3 dealerships that are close enough to work with. When we purchased, I started with the closest one and worked my way out. I communicated with 4 dealerships and ended up buying with the 3rd one. By far, they provided the best purchase arrangement. I was actually concerned that I was missing some fine-print 'gotcha' because they were so much better than the others.

I figured that I'd at least reach out to the closest one and the one that we purchased from and try to decide who is best equipped or most willing to provide a good result.

This car went from rock-solid to practically unusable overnight. Do people end up with a loaner car while they wait to get their leaf batteries fixed?

Thanks,
Mark
MikeinPA
Posts: 165
Joined: Wed Jul 08, 2015 7:20 am
Delivery Date: 21 Dec 2013
Location: Pennsylvania

Re: 2020 57k Miles Failed Cell Warranty Advice CVLI Test

If that delta gets large enough the BMS will prevent the battery from starting. At least that is what happened in my 2013 at somewhere around 600 mv delta. Mine had a "fully charged" battery that would not even give me a turtle--lucky it happened at home. You will be left with the pack at high SOC and no way to lower it to good storage levels.

Definitely find out which dealer is good at working on these. Try every discussion board out there. Getting good service on this all comes down to the dealer and there is a huge bell curve like distribution of great all the way down to very bad. I've read about great a lot here, and experienced very very bad myself.
2013 Pearl White SV man 09/13 58k purchased new 12/13
2013 Ocean Blue SV man 07/13 18k purchased used 12/19
MarkCoburn
Posts: 9
Joined: Sun Oct 02, 2016 5:27 pm
Delivery Date: 26 Sep 2016
Leaf Number: 408114

Re: 2020 57k Miles Failed Cell Warranty Advice CVLI Test

Here is when took about a two mile trip to try and reproduce what had just happened.

[youtube]https://youtu.be/DsWnv_K7gDE[/youtube]
MarkCoburn
Posts: 9
Joined: Sun Oct 02, 2016 5:27 pm
Delivery Date: 26 Sep 2016
Leaf Number: 408114

Re: 2020 57k Miles Failed Cell Warranty Advice CVLI Test

Update: I emailed a used car dealer who specializes in EVs (PlattAuto.com). I bought my first Leaf from them and I trust them. In the email I asked their opinion of the local dealerships for warranty battery work.


[youtube]https://youtu.be/05s6-SdMSA8[/youtube]
User avatar
Stanton
Posts: 2956
Joined: Thu Feb 03, 2011 10:56 am
Delivery Date: 01 Sep 2011
Leaf Number: 7458
Location: Orlando, FL
Contact: Website Twitter

Re: 2020 57k Miles Failed Cell Warranty Advice CVLI Test

I don't see any mention of LeafSpy in your replies/posts...so I thought I would throw this out there.
The only way to get a dealer to do anything with the battery pack (warranty or otherwise) is if it throws DTCs...and you need LeafSpy to prove those DTCs (assuming they exist). From personal experience, dealers don't like to open up battery packs (only sell you a new one), and finding qualified (EV) repair shops can be difficult. I did this (on my own nickel) a couple years ago for my 40 kWh pack and it's not fun.
2011 Blue Ocean SV w/OVMS (no TCU)
12v LiFePO4 battery
FIAMM 74100 horns/Wet Okole seat covers/Tor's heater mod/Dala's CAN-bridge
Lizard Pack (Rev E) installed @51 months/41k miles
40 kWh Pack (Gen2) installed @115 months/84k miles
Learjet
Posts: 405
Joined: Tue Mar 24, 2020 8:04 pm
Delivery Date: 11 Mar 2020
Leaf Number: 309454
Location: Louisiana, USA

Re: 2020 57k Miles Failed Cell Warranty Advice CVLI Test

Once my car generated a service light and stored DTC codes Nissan and my dealer changed the weak cell.

Yes, my dealer had a properly trained tech and he did a good job at replacing the defected cell module. They would not do anything until it generated a DTC code. Keep divining it and it will eventually store a code.
2019 Nissan Leaf SL Plus
Build Date 2/19...car sat new for 1 year until I purchased 3/20
MarkCoburn
Posts: 9
Joined: Sun Oct 02, 2016 5:27 pm
Delivery Date: 26 Sep 2016
Leaf Number: 408114

Re: 2020 57k Miles Failed Cell Warranty Advice CVLI Test

Stanton wrote: Thu Sep 28, 2023 9:29 am I don't see any mention of LeafSpy in your replies/posts...so I thought I would throw this out there.
Thanks

The picture on my first post is from LeafSpy.
MarkCoburn
Posts: 9
Joined: Sun Oct 02, 2016 5:27 pm
Delivery Date: 26 Sep 2016
Leaf Number: 408114

Re: 2020 57k Miles Failed Cell Warranty Advice CVLI Test

I'm a bit worried that the car is just going to go into an error mode and completely shutdown.

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