Happened to me a few months ago, and a lot of others. Usually seems to magically fix itself within 3-5 days.
https://www.macanevowners.com/forum/threads/assistance-systems-error-speed-limit-display-warning-message.17142/page-12#post-365253
While overall I think the concept of giving away free, unlimited DCFC is a very bad idea, since we got it (i.e. surely paid for it in the purchase price), we've made good use of it. 80% of our miles are road trips. We'll complete our 1st year soon having done about 18,000 road trip miles. I...
I tried multiple steps trying to fix it, including a full factory reset (always a pain to reset everything back). No effect.
When it started to come back on it's own a few days later, it did so in a few stages. One day the map location was correct, ACC started working, then next day the...
Like most others, it's just magically cleared itself up within a week for me.
My best guess is that it's something to do with the GPS. Even when it was messed up, GPS *movement* was accurate. But it lost it's map calibration. It was showing me moving in the right direction and speed, but in...
Time loss, not energy loss. The car simply tells the EVSE to deliver less power, which means charging slows down and takes longer.
The car's BMS is always telling the charger (whether AC or DC) what the max power level to deliver at any second. Sometimes the car will accept the max power the...
This is the first time I've heard a suggestion of extra energy loss as the power draw slows down. The car's BMS simply tells the EVSE to deliver less power. It's not continuing to deliver max power and the car only accepts some of it, if that's what you're thinking.
There's always some power...
We normally choose a dark interior, but the Macan we found in stock closest to what we wanted had the chalk interior. It does look really nice. 20,000 miles in so far and no problem at all. (But we're 2 seniors, not a family with kids.)
At 70 MPH with perfect weather, yes, 340 is plausible.
In summer weather, we get from our home north of Denver to Grand Junction (270 miles) from 100% to around 15%, averaging 70-75 MPH. But only when warm. Anything under 50F and we have to stop and charge.
Below 50F, it drops significantly...
2 days later, now it's all suddenly working again. Map is correct, speed limit back, no error messages. Weird.
I had a service appointment scheduled next Monday, but I think I'll cancel it now. Our nearest dealership is far enough away to make it a chore if not really necessary.
Yeah, same menu, no difference.
However, unrelated to that setting, the next day it magically came back. The location services are still all messed up (map is way off, no speed limit, etc), but ACC and LC are back. For the moment, anyway. The error message now says "limited" instead of "not...
Hmm, I'll have to try that. I didn't use the stalk button, just the PCM menus, but in OFF I couldn't get any CC. Maybe the stalk button has a different menu.
I was also hoping there was a way to activate "dumb" cruise control, but I'm not finding it. I tried changing it from Adaptive Cruise Control to OFF in hopes that would turn off only the adaptive part, but nope, it deactivated CC altogether.
That's something I really appreciated in my Mach-E...
I tried doing a factory reset yesterday, but it didn't fix it. I hoped it would do more but it doesn't seem to affect internal car functions at all, just the PCM stuff. It's basically just a PCM reboot that also wipes out all your settings/accounts. Which then requires an hour of work to log...
Right now I couldn't use the Porsche nav even if I wanted to. Location services is all messed up. It thinks the car is 2 miles from where is actually is, and all driver assistance systems won't work. 😖