Replacement battery $2500!
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From: Moose Mtn. Alaska
As stated in the pdf, this applies to 2020 and 2021 992s. Since your car is a 2022 you don't need the upgrade as I assume your ConCon value is HIGH not LOW; and you have PCM6. Correct?
The upgrade I assume restricts polling of various modules causing battery drain and ultimately failure.
siberian
The upgrade I assume restricts polling of various modules causing battery drain and ultimately failure.
siberian
Last edited by siberian; Dec 30, 2022 at 11:41 AM.
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Last edited by aggie57; Dec 30, 2022 at 12:51 PM.
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Nice! Now all I have to do is convince my genius SM at the alas only dealership in the State that despite it being clearly relevant to my car he insists it doesn't apply. Where do they find these people...? Anyway not driving 700 miles round trip at this time of year.
siberian
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Got the car back on 12/31 between snow storms. Service Writer said update installed. The battery was charged overnight and checked out ok twice. It’s sat for a week because of a lot of snowpack on the roads. Went out to drive it today and battery is dead. Here we go again.
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Got the car back on 12/31 between snow storms. Service Writer said update installed. The battery was charged overnight and checked out ok twice. It’s sat for a week because of a lot of snowpack on the roads. Went out to drive it today and battery is dead. Here we go again.
I assume the car was in a (heated) garage during the week it sat and not under a pile of snow...
siberian
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I don't want to belabor the point but please ask for a copy of the VAL showing the previous and current CCU version. Not that I don't believe the "service writer", it's Trust But Verify. Show me.
I assume the car was in a (heated) garage during the week it sat and not under a pile of snow...
siberian
I assume the car was in a (heated) garage during the week it sat and not under a pile of snow...
siberian
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Totally agree other than by 40 below your battery will discharge, trust me, it's why we have heating blankets for them up here. I was just asking as the SM may use that as a "well you left it outside in the rain? No wonder...". But no it shouldn't have an adverse effect unless you're really up North. My take has always been it's in the BMS and I was hoping the TSB#2229 would solve this issue. However, as I mentioned in an earlier post, because of the interrelated and interdependent nature of vehicle architecture the phantom discharge may be caused by the countless accessories such as PVTS, anti-theft, CarPlay, Sirius... Just appalling in a car of this cache where "excellence is expected".
siberian
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Update on my car at the shop. The car has been with them for over 2 weeks to perform drain detection. I shared with them the software upgrade that was shared here too.
Today then updated me saying they found 2 active draws.
Today then updated me saying they found 2 active draws.
- Power draw from the computer module
- Power draw from the seat motor.
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Did they perform the upgrade? If they did, was that prior to detecting the two draws? You might ask if PCNA will issue a new TSB based on this. I firmly believe the draws can be virtually anywhere, like why the seat motor fercryinoutloud? I'm assuming the PCM or computer module may be receiving constant "updates" from the BMS ... I'm sure it's frustrating for Porsche but this battery issue should never have left the lab... Please keep us posted!
siberian
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Same seat motor fault
My dealership also did the seat motor current draw fix. That was about a yr ago and it didn’t work, battery would die after 1 day. Replaced battery under warranty but still if I leave for a week without tender, it disconnects due to under voltage. No accessories.
2020 C4S garaged
2020 C4S garaged
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I believe my battery drain problem is now fixed after the bulletin/fix in the DIY channel was implemented. (2021 C4S). Just left the car for 10-days in the garage and went on a trip in my RV. When I got back... the power was still on and engine fired up immediately! Previously it would have died after 2-3 days. I think I can relax now.
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From: Moose Mtn. Alaska