Assistance Systems Error - Speed Limit Display (warning message)

[Awaz]

However, as of today (15 January 2026), both problems have suddenly disappeared. I did not change anything and did not take any action—the issues vanished just as mysteriously as they appeared.

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[dbsb3233]

We're on a road trip to Las Vegas. Car started flaking out yesterday. Radio wouldn't work, Assistance Systems Error (no ACC), no speed limit showing, and that little yellow symbol that looks like a car next to a stop sign (??) is at the bottom. 15 minute drive across town. After I got there are parked, opened the liftgate, and went back to open the driver door, the radio came on. All seemed OK for a while the next day.

And even more weirdly, at the start of that drive, the speed limit appeared in the European format (red circle) before switching to US, then going away altogether.

Then for the last 3 drives today, Assistance Systems Error is back (plus that little yellow icon) and isn't going away. Tried the PCM reboot multiple times, and it has no effect. Sensors are all clean. I got the software update maybe 2 months ago.

Ugh.

 

[pdealessandrini1930]

We're on a road trip to Las Vegas. Car started flaking out yesterday. Radio wouldn't work, Assistance Systems Error (no ACC), no speed limit showing, and that little yellow symbol that looks like a car next to a stop sign (??) is at the bottom. 15 minute drive across town. After I got there are parked, opened the liftgate, and went back to open the driver door, the radio came on. All seemed OK for a while the next day.

And even more weirdly, at the start of that drive, the speed limit appeared in the European format (red circle) before switching to US, then going away altogether.

Then for the last 3 drives today, Assistance Systems Error is back (plus that little yellow icon) and isn't going away. Tried the PCM reboot multiple times, and it has no effect. Sensors are all clean. I got the software update maybe 2 months ago.

Ugh.

We're on a road trip to Las Vegas. Car started flaking out yesterday. Radio wouldn't work, Assistance Systems Error (no ACC), no speed limit showing, and that little yellow symbol that looks like a car next to a stop sign (??) is at the bottom. 15 minute drive across town. After I got there are parked, opened the liftgate, and went back to open the driver door, the radio came on. All seemed OK for a while the next day.

And even more weirdly, at the start of that drive, the speed limit appeared in the European format (red circle) before switching to US, then going away altogether.

Then for the last 3 drives today, Assistance Systems Error is back (plus that little yellow icon) and isn't going away. Tried the PCM reboot multiple times, and it has no effect. Sensors are all clean. I got the software update maybe 2 months ago.

Ugh.

Best plan is call and book service with your dealership. Software glitches are sign that dealership service dept should review and do proper reboot. Likely couple of days process. Get a loaner. Best wishes.

 

[dbsb3233]

Got my car back today (Dec 15) error-free! Front camera had active faults from incorrect coding, and an internal fault. Reprogrammed the camera and calibrated everything, test drove it and cleared all faults. No codes, no warnings after about 100 miles. They also fixed my GPS, which was not showing the correct location of the car. That turned out to be software related also.

I'm glad these are fixed, but certainly didn't expect a Porsche to be delivered with such easily detected issues. And I did make it known to the dealership GM.

Mine is doing the same. The car thinks it's 2 miles off from where it actually is. I even drove it around a little and the map shifts with it (i.e. stays 2 miles off). I tried the nav and it thought I was different roads than I was on, tried to tell me to turn where there wasn't a road, etc. GPS detects movement correctly, but the software isn't translating that to the correct map location. Even the app is showing the car in a different location than it is (a good way to tell if it's still messed up).

Many settings in the car that rely on location data are grayed out. And the speed limit indicator is missing.

The Assistance Systems Error seems to be just a symptom (missing correct road data so it's making itself unavailable to use). The cause seems to be the location services being messed up. This message pops up just for a few seconds before the Assistance Systems Error that stays. The car seems to think it's in the wrong region.

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