Once again...the battery...

[Caraholic]

Just checked again, and I am part of the April 19 battery recall. My SA has noted this, and I'm waiting for them to respond. I'm especially concerned with the following statement on the recall notice:

THE REMEDY IS NOT AVAILABLE AT THIS TIME

What the heck does this mean? Have I lost the ability to drive my car until "THE REMEDY" becomes available? Why wouldn't they just replace my battery pack? Anyone have any insights?

from what my dealer told me is it’s just a 5-6 hour inspection. Then if they find something they will have to order parts which are not yet available.

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[Tooney]

Just checked again, and I am part of the April 19 battery recall. My SA has noted this, and I'm waiting for them to respond. I'm especially concerned with the following statement on the recall notice:

THE REMEDY IS NOT AVAILABLE AT THIS TIME

What the heck does this mean? Have I lost the ability to drive my car until "THE REMEDY" becomes available? Why wouldn't they just replace my battery pack? Anyone have any insights?

There are at least 3 separate recalls for Taycans entitled "High voltage batteries may short circuit" :
Campaign APB5 Dec 13, 2023 NHTSA 23V840000 205 units
Campaign ARA4 Mar 20, 2024 NHTSA 24V215000 606 units
Campaign ARA5 Mar 20, 2024 NHTSA 24V217000 749 units

Posts with links to NHTSA documents for each of these 3 recall campaigns are in the "recalls" category of this forum.

As of today, there are no TSBs from Porsche posted at NHTSA that provide dealers with detailed instructions/procedures for handling the recalls. Either the TSBs with dealer procedures have not yet been posted at NHTSA, or they have not been issued to dealers.

 

[Tooney]

For campaign APB5 (the oldest of the 3 battery may short circuit recalls), owner letter says:

And Porsche updated submission to NHTSA dated April 9, 2024 says about "remedy":

 

[d00d]

My VIN is for all three, dealer didn't have a problem scheduling a visit for them.

 

[T4S]

Just checked again, and I am part of the April 19 battery recall. My SA has noted this, and I'm waiting for them to respond. I'm especially concerned with the following statement on the recall notice:

THE REMEDY IS NOT AVAILABLE AT THIS TIME

What the heck does this mean? Have I lost the ability to drive my car until "THE REMEDY" becomes available? Why wouldn't they just replace my battery pack? Anyone have any insights?

I am confused... so your HV battery already had some modules replaced, but the recall mandates more battery modules to be replaced or even a full battery replacement? Wouldn't your Porsche service team already have the data from when they originally did your module replacement to check if you are no longer affected by the recall?

 

[Vim Schrotnock]

Evidently they were not aware of the problem when they did the module replacement last September. The Porsche Battery Tech said he checked all the modules, and the battery should be '...as good as new or better...'. Not the case.

 

[WasserGKuehlt]

These recalls seem to be more of the “proactive” kind, and batched by (unknown criteria), rather than being reactions to known defects of specific cars. Growing pains, and getting better about logistics. (Though obviously not becoming more transparent.)

 

[T4S]

When I dropped off my car again for unrelated battery issues, I had a chance to talk to the tech who worked on my HV battery module replacement and I mentioned about the slight differences in voltages for the newly replaced modules. He said that because the modules are a newer chemistry, the BMS is programmed to charge/discharge those new replacements at a different rate than the rest of the modules. So apparently this is normal behavior as long as it doesn't get significantly out of balance.

However, I still want to try to "rebalance" my pack to ensure I don't get any RCODs (Red Circle of Death).

 

[bn8959]

When I dropped off my car again for unrelated battery issues, I had a chance to talk to the tech who worked on my HV battery module replacement and I mentioned about the slight differences in voltages for the newly replaced modules. He said that because the modules are a newer chemistry, the BMS is programmed to charge/discharge those new replacements at a different rate than the rest of the modules. So apparently this is normal behavior as long as it doesn't get significantly out of balance.

However, I still want to try to "rebalance" my pack to ensure I don't get any RCODs (Red Circle of Death).

That seems like odd info. I can’t see how the BMS could practically achieve that. The cells are in a series-parallel arrangement and it’s not possible to control one module discharging more than others. All the BMS can do is control the overall charge and discharge rates, plus perform cell rebalancing.

 

[Tooney]

These recalls seem to be more of the “proactive” kind, and batched by (unknown criteria), rather than being reactions to known defects of specific cars. Growing pains, and getting better about logistics. (Though obviously not becoming more transparent.)

From NHTSA recall posting, looks reactive to me. Porsche report to NHTSA states there are safety related defects in the subject vehicles:

Also, NHTSA includes its investigation into LG HV battery failures in other brands as an 'associated investigation' with these Taycan recalls: https://static.nhtsa.gov/odi/inv/2022/INOA-EQ22001-7596.PDF

 

[WasserGKuehlt]

From NHTSA recall posting, looks reactive to me. Porsche report to NHTSA states there are safety related defects in the subject vehicles:

Also, NHTSA includes its investigation into LG HV battery failures in other brands as an 'associated investigation' with these Taycan recalls: https://static.nhtsa.gov/odi/inv/2022/INOA-EQ22001-7596.PDF

The machine-learning-based algorithm of identifying the subjects of the recall is what prompted my remark.

 

[T4S]

That seems like odd info. I can’t see how the BMS could practically achieve that. The cells are in a series-parallel arrangement and it’s not possible to control one module discharging more than others. All the BMS can do is control the overall charge and discharge rates, plus perform cell rebalancing.

Correct and that is exactly what I was thinking when it was explained to me, but I didn't want to push further. Time will tell if this is a permanent fix and hopefully we know sooner rather than later. Porsche's modular battery packs are supposed to be easier to service if a module goes bad and cheaper than replacing the entire battery pack. It would be unfortunate if it ended up being useless and everyone had to have battery replacements instead of modules.

 

[T4S]

The machine-learning-based algorithm of identifying the subjects of the recall is what prompted my remark.

So would we have to enable something in the PCM for Porsche to include our Taycans as part of their field-data or do they have the data from all cars?

 

[Tooney]

The machine-learning-based algorithm of identifying the subjects of the recall is what prompted my remark.

1500+ recalled Taycans in US alone (plus 142 in Canada) is not a good situation. Let's hope the recall does not widen.

 

[WasserGKuehlt]

So would we have to enable something in the PCM for Porsche to include our Taycans as part of their field-data or do they have the data from all cars?

Porsche is being very coy about what they capture and how, but no, I would not assume there is anything you can do to influence their data collection. Short of, you know, driving around with a Faraday cage affixed to the car.

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