Limited Power - Motor power is being limited (Error with full charge)

[cwerdna]

Ready mode meaning car is on, but in park? That's what I was in.

Park is fine. Green car with arrows lit is READY mode (holding down brake pedal while pressing power).

If it was in some other state (e.g. you pressed power button one or more times w/o pressing brake pedal), then all bets are off... See page 5-9 of https://www.nissanusa.com/content/dam/Nissan/us/manuals-and-guides/leaf/2017/2017-Nissan-LEAF-owner-manual.pdf for other states/positions.

 

[nlspace]

12.56V for the auxiliary battery while in READY is too low--I still suspect the aux battery even if the dealer doesn't think so. We have seen too many problems and issues, too many times, that were caused by a weak or low aux battery voltage.

But if that cell data is valid, then it does appear to be a low cell in the pack, which would explain the 2-bar loss. And they should replace it under warranty.

 

[MikeinPA]

Just had it towed over to the dealer. (turtle mode would not be fun in traffic!) The dealer is who replaced the 12v battery, asked if that could be the issue and he didn't think so. Probably won't know anything until Monday.


Let see if this works: here's a couple of links to screenshots.
https://photos.app.goo.gl/n5qWxXS8ticgYiPq9
https://photos.app.goo.gl/vxLDC33EK1eYeeXG7

The big lithium battery is warrantied for 8 years against defects. The screenshot is showing a bad cell. Check for error codes related to a bad cell and ask the dealer what codes they are seeing.

 

[SageBrush]

That the pack has a bad cell is clear. A 40 kWh pack replacement is on the horizon ... unless Nissan decides to only replace the bad cell in the current pack.

I'm not sure how the 12v battery early death ties into this, or if it is a separate issue.

 

[tfernandezleaf]

That the pack has a bad cell is clear. A 40 kWh pack replacement is on the horizon ... unless Nissan decides to only replace the bad cell in the current pack.

I'm not sure how the 12v battery early death ties into this, or if it is a separate issue.

That would be awesome to get a 40kw replacement!

 

[SageBrush]

A 40 kWh pack replacement is on the horizon ... unless Nissan decides to only replace the bad cell in the current pack.

That would be awesome to get a 40kw replacement!

Be careful what you wish for. A 40 kW pack would suck; a 40 kWh pack would be quite nice

 

[tfernandezleaf]

A 40 kWh pack replacement is on the horizon ... unless Nissan decides to only replace the bad cell in the current pack.

That would be awesome to get a 40kw replacement!

Be careful what you wish for. A 40 kW pack would suck; a 40 kWh pack would be quite nice

I think I have a 40kw right now :lol:

I didn't get the specific code from the dealer, but this is what he said when I asked again what the message was: "there is a cell deviation code stored in the computer. We have to open a case with our engineers for them to tell us what the next step is. Hopefully they will get back with us today. I'll update you later."

 

[SageBrush]

I didn't get the specific code from the dealer, but this is what he said when I asked again what the message was: "there is a cell deviation code stored in the computer. We have to open a case with our engineers for them to tell us what the next step is. Hopefully they will get back with us today. I'll update you later."

My strong impression is that your dealership has a very minimal competency in LEAF repair. I very much doubt they are technically able to open the pack and swap a cell. So that leaves swapping the entire pack (a much simpler procedure), or somehow arranging for a competent technician to replace a cell, either by moving your car to a competent dealership or by bringing in outside competency.

In this, you are well served by dealerships being independent franchises: they do not share between themselves and their ability to be flexible is severely limited. Nissan could send its own technician but they have not done that in the past.

--
If the dealership tells you that Nissan wants to replace a cell, it is their right. But you need to demand that they supply a replacement car. That will rebalance Nissan's estimate of the cheapest route for them to follow.

 

[nlspace]

Next time you see them you can ask if it threw some DTCs such as P33E6 about a cell voltage deviation, and P3375 for cell over-discharge in module 1. Hope they can get your repairs done quickly.

 

[tfernandezleaf]

Got an update from the dealer, they are going to replace the cell, he said it should be in tomorrow so might have the car back by the end of the week.

 

[SageBrush]

Since this is a warrantied repair, any diagnostic fees you paid surrounding your complaint should be returned to you.

 

[tfernandezleaf]

Just wanted to update, got my car back and it is holding a charge as it should but I thought I should have gotten the 2 lost bars back (?) Everything was covered under warranty.

 

[SageBrush]

Just wanted to update, got my car back and it is holding a charge as it should but I thought I should have gotten the 2 lost bars back (?) Everything was covered under warranty.

Probably not, but
Show us a LEAFSpy histogram of cell voltages when fully charged

In your earlier photos, the car had 38.4 Ahr of energy at 64% SoC. If you extrapolate to 100% SoC (not quite kosher, but good enough for this discussion) your full battery with one bad cell holds 38.4/0.64 = 60 Ahr. Your bad cell is ~ 1/100 of your pack so its replacement by a healthy cell bumps up fully charged capacity ~ 1%. Ergo, your fully charged capacity remains about the same as before

 

[tfernandezleaf]

Here's the LeafSpy from today, full charge

https://photos.app.goo.gl/QNdj35fvF4S8ZxyX6
https://photos.app.goo.gl/62GKMRzPqjdmsuxe9
https://photos.app.goo.gl/DJS5aoerA5ZNz7S36

and the Guess-O-Meter
https://photos.app.goo.gl/2KevWnUtXrzNEueZ6

 

[cwerdna]

Full charge graphs aren't really interesting. It'd be more interesting to see when SoC is lower... say down anywhere between 20 to 40%. The efficiency graph we don't need.