Ludalicious
Active Member
I've actually been through all three doors now!
LOL.... Well played
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I've actually been through all three doors now!
Tray, when was the last time you were able to drive past zero?I can drive to minus 18KM if necessary. Tested by accident on the very first test drive.
Battery pack magically balancing above 90% is a myth and wive's tail. In fact, Tesla has stated on multiple occasions to multiple people (myself included) that the BMS balances the cells 24/7 and at all SOCs. The reason Tesla recommends driving to zero and then charging to 100% is not to rebalance the pack, it's for the range algorithm to fine-tune the actual top and bottom ends of your pack.
Just a few weeks ago I drove my P85 down to 4 miles without issue. I've driven it down to zero a few times out of necessity, no issues.
...which was a bad idea and pretty irresponsible.Musk tweeted recently that Teslas can drive 5 miles past zero.
P.P.S. one of the worst things (besides being scared to go low in range ever again) is that Tesla says since everything looked fine diagnostically, I must have run out of charge on my own so I have to pay for the $240 tow truck.
Thing is, in an ICE vehicle, at low fuel level, the warning light ALWAYS comes on letting the driver know to refuel soon. And there's usually something like a couple gallons left when the warning light appears. In OP's case, there were 32 miles, and then poof, gone. That's unacceptable. I don't see how Tesla can tell OP that everything's fine diagnostically.
Finally 2 days before all this, I had charged to full and got 255 miles + 25 ghost miles - where I drove 25 miles before the range started decreasing from 255.
That really leads me to think that it was a balancing issue. And if you take the 32 miles it showed and subtract your 25 ghost miles that would put it shutting down at 7 miles. Which is closer to 3%. And at 3% a heavy acceleration could definitely cause the voltage to dip.
I'm not really sure there is anything you can do other than testing running low again to see what happens.
Another person that had something similar happen had the same thing, Tesla said everything was fine, and then like a month later they confirmed that his pack had a fault and replaced it. Getting out of balance can be a warning sign of an impending failure. (Or it can just be getting out of balance.)
Also, don't know if it's related, my range at 100% battery has dropped from 255 miles down to 240 overnight, probably because of the same software upgrade. Finally 2 days before all this, I had charged to full and got 255 miles + 25 ghost miles - where I drove 25 miles before the range started decreasing from 255.
If real is 240 (15 less than 255), and after the full charge it said 255 for 25 miles, that is 40 miles of non existent range reported. The car stopped working at 33 miles reported, which would be 7 miles beyond the typical 240. That lines up with Elon's statement on reserve.
Would need logs of miles and charging to see if that initial bad range data point was the issue.
Yeah, that data lines up, especially is you're back to a 240 full charge. I had a similar issue when I found out my plow truck would no longer read less than a quarter tank. I used it so rarely that I didn't notice the consistent reading.Interesting thought - that could be what happened. I knew something weird was happening when I drove for miles and miles and it still showed 255! I didn't consider that it would come back to bite me later without any warnings.
Yesterday as a test, I took it down to 26 miles of range without issue, but then needed to charge so I don't really run out for errands today. At least it wasn't dying on me at 32 miles again.
For the $240 tow truck reimbursement, I couldn't get through to anyone at Tesla who could help by phone - Service center says they don't write checks, and to talk to Roadside Assistance, while Roadside Assistance says to talk to the Service Center. I've emailed [email protected] and [email protected] with no response so far.
You don't have a SW limited higher capacity pack by chance, do you?
Yeah, 75s shouldn't be SW locked, but if you had a loaner 90 pack or something abnormal that could have been a factor.I don't think so. I think the 2017 S75's shipped with a 75 kw battery, and that's my capacity now...I think they SW limited it for the 60 version. I'm sure others on this forum know more than I do.
I can live with the one-time tow charge, if I was sure this wouldn't happen again. If it isn't my battery failing, then I guess I had some weird sequence of events that obviously isn't too common, or else others on this forum would be running into the same situation...