This may be way too much information for my question, but in case it's relevant, I'll explain what led up to having several codes...

2020 Cayenne Turbo was at a body shop for minor damage to the lift gate, which was replaced. The battery died while there, which is a whole different (and painful) story. It had to go to the dealer for programming after the repair, as well as battery replacement.
It came back from the dealer with a service necessary message, which they said was there when they got it. Thanks Porsche, you couldn't have mentioned that to me to see if I wanted it taken care of? Strong work. Anyway, it turned out to be an oil change needed, which I did myself. I borrowed a Launch X431 scanner from a friend and reset the service reminder. I have absolutely ZERO experience using the scanner, so hesitant to do too much to say the least. I did have it run an "Intelligent Scan" and it came back with all kinds of codes - attached. I am assuming these are a result of the battery replacement and sensor removal/installation with the liftgate. The dealer invoice mentions recalibrating cameras, reprogramming the LCA Radar, and "after service faults" from sensors being removed. Is it normal for DTC's to continue showing up as inactive, or should they be cleared? I'm guessing its just so they can see the history, but have no idea. Should I clear the codes, or just leave them as is?

The bigger issue is that this morning it gave a "Chassis system failure" message. Google shows something with the air suspension. It's only been back from the body repair for about two weeks and the suspension has been in the normal setting the whole time. I had just put it in sport plus yesterday, so no idea if that has anything to do with it. It went away after restarting, so I brought it home and ran a scan again (the one attached). Right after doing so, the car had a "Drive distribution system failure, rear-wheel drive only" message. That too went away after a restart, so no idea what's going on. Should I be worried about the messages today, or is it somewhat normal to have a glitch like that that appears and goes away immediately?

Sorry for the long post, and thanks for any input!

 

A Diagnostic Trouble Code (DTC) is registered whenever a system tests outside normal values. However, not all DTC’s will trigger a driver notification.

Some codes, such as engine misfire, take many failures (sometimes dozens or hundreds) to trigger a notification. Therefore, it will be stored as a Pending DTC.

Others will trigger a notification immediately, such as ECU no communication. It is classified as an Active DTC until it passes the test.

Once an active DTC passes the test, it is reclassified and stored as an Inactive DTC.

Your dead battery caused many, if not all of your DTC’s. Installing a new battery cleared them and the ECU reclassified them as Inactive DTC’s. Clearing them should be just fine and cause no issues.

 

I clear ALL codes all the time. I use my iCarsoft CR Max often. No issues to clear codes.

If something is wrong, the code will come back. If something is wrong, you are probably aware of it.

Your list of codes that clear on their own sounds like a battery on its way out. But you just had the battery replaced, correct?

 

Thanks so much for the quick and expert replies!

yes, the battery was just replaced by Porsche and the invoice states “update programming and clear faults.” I have no idea if all the codes were prior to the new battery or after, but I’ll clear them and check again. I’m primarily nervous about the chassis failure and awd messages from this morning.

 

As chassis wrote. Clear all codes. Drive couple of miles and check the codes again. If they return go to your dealer.

 

I cleared most of the codes, but one repeatedly shows up in every scan. Under the ACC category, its U112200. A google search mentions the rear body control module, which was removed/reinstalled during the body repair. The dealer invoice mentions "program rear module" so I will check with both the dealer and the body shop on that. Everything seems to be working fine, including the ACC, and no messages on the car.

One other dumb question - is it normal for several codes to show up every time the car is driven? Every time I clear them, drive it, and rescan, there are several shown.

 

Yes, normal to have codes appear often.

 

Agreed, don't keep checking (unless there is a particular reason or malfunction to be concerned about). Our recently purchased, CPO'd '21 came from the dealer with maybe 12 DTCs (so goes to show the dealer doesn't know or care about them). I also have 1 or 2 that won't stay cleared. Car is fine.....My prior 8-12 y.o. BMW had soft codes that wouldn't stay cleared. As the cars age these things happen.