Urgent help! Car won't start, many faults
 

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MY20 992S, been driving it for 4 years no issues whatsoever. I was driving then I parked for a few minutes. When I tried to turn it on I got these. What do you think is the issue? I disconnected the battery for now, I'll wait a bit then check again.

Any luck with the battery disconnect? Do you have a tool to read the faults?

I'm still waiting, I didn't reconnect it yet. I don't have a reader unfortunately.

*Edit: no luck after disconnecting the battery, waiting 30 minutes, reconnecting.

I used to get those types of messages on cold mornings when the battery was low. None since adding a trickle charger.

Have you checked the battery itself? Modern 911's throw all sorts of errors when the battery is low.

I would guess it's the battery. If you're lucky it might be an AGM one and 4 years is a good run on the (poor) ones that Porsche supply. Replace it with a Varta or Bosch if you can ...

Good idea, I'll try a new battery tomorrow.

+1
Classic dead battery symptoms especially at 4 years with car running fine before and it now being winter.

@lemonorlime I know is looks alarming but it could be very simple. Don't fret.
I had the exact same thing happen to my Macan. It was the ABS sensors. It also happens with weak batteries.
Seems premature for a 992, which is why you probably haven't found info on it yet. Macans have been around a bit longer.

I had this too after 4 years. Dead battery

I replaced the battery with a Varta AGM 70Ah, still the same behavior.

That many errors is either from what others said, low voltage across the board in the car, but most common to happen when something gets messed up on the CAN bus.

Either a connector or pin slipped or got a bad connection, or a sensor has failed, or a sensor or connect has a lot of water in it, or a wire is damaged or (rare) a controller is bad.

Once one ECU or CAN or LIN network in a "system" of ECUs goes down or stops communicating normally, it causes the next one as well to flag an alert since it's not getting the responses or information it's expecting from the first one with an error, and this is like a domino and creates a christmas tree effect with everything or very many related things lit up. Basically, you can ignore most because they will go away when the root cause is found. In your case you have transmission messages, parking brake and suspension messages. Transmission usually is on a high speed CAN network with engine but you don't have engine error messages, nor brake error messages or things like active safety systems which are also on high speed networks. The lack of those, and the involvement of something relatively low priority like the parking brake could be a connector or button or harness problem in your console areas that manage parking mode on the transmission, suspension setting, the shifter itself and the electronic parking brake. It could be a simple ground wire that's loose, there's usually a dozen or more in modern cars. Of course all well hidden behind panels and carpets (service manual would show where if you like to dig yourself).

Any liquid spills that could have made its way in the console? Have you had any panels out to retrofit trim or anything around the shifter, cup holder?

Other little further away items would be any other mods, anything plugged into the OBD port, custom piggyback wiring anywhere or a potential powertap for a radar detector or dash cam?
If you get a power pin making contact with a CAN or LIN wire you can get a cascade of errors, same if a CAN wire hits ground due to being damaged, or a pin somehow gets loose in a connector.

Last one, winter being a high potential for this - is there any chance you had mice get to your car? They do seem to enjoy eating insulation on wires. (this sounds weird but does happen to cars and motorcycles at times)

This is very valuable, I think you may be on the right track. To answer your questions: no mice, nothing connected to OBD2 port, no liquid spillage. I have Stage 1 M engineering tune since 4 years zero problems. I'll ask my garage to read your feedback, appreciated.

Wow, good thoughts here :thumbup:

I had a similar issue on my 2024 Porsche 911 Carrera T, and when I check the mobile app, it gave me this description, far more than the instrument cluster screen...
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