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Discussion Starter #1
This message came up during either turn 6 or turn 8 at Laguna Seca, both of which have elevation changes and the car jumps around.

I pulled off the track and was kind of freaked out because my gauges looked fine. I shut the car down, and a couple minutes later, it was gone. The next morning, I added a little coolant (not much at all) and filled it to almost max. I had the car on the track all day and it never came up again since that one time.

Has anyone else experienced this or know what might be the cause? I asked around and the best explanation was I might've tripped a sensor from the car rocking so much. My low fuel warning came up even though I had a half a tank, so that sensor must've gotten rocked as well.
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I think you answered the question your self :)
There is a thread/post somewhere in here about our cars going in to limp mode if your driving on a banking like on an oval.
The solution was to turn of the car for 30 min.
 

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Is your car a late 2017 or early 2018 build?

Mine is, and there is a TSB for coolant warning anomalies. In my case, it was a false low-level warning. The fix was the installation of a new support for a connector that was prone to giving intermittent signals.
 

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Is your car a late 2017 or early 2018 build?

Mine is, and there is a TSB for coolant warning anomalies. In my case, it was a false low-level warning. The fix was the installation of a new support for a connector that was prone to giving intermittent signals.
This is interesting! I had the same warning like VHS while sitting in a T-Mobile parking lot with the engine stone cold, as I was trying to figure out CarPlay. I drove the car for 1/2 mile back home and the warning went away (but it was retrievable by Porsche on the laptop).

Momentum Porsche said that it was likely that the coolant level was slightly low, so they filled it up and told me that if it shows again they will drop the engine and replace the coolant reservoir. Nothing about 'a new support for a connector...'

It makes me wonder...

Do you know whether they had to drop the engine or did they do it on the spot?

PS: Here is the Rennlist thread with more details:

https://rennlist.com/forums/718-forum/1102661-982-service-bulletin-coolant-reservoir-and-sensor.html
 

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I have posted a while back (1 years or so) regarding the low coolant lvl.
Yes the engine needs to come out and for me it took 3 days + 3 moore since Porsche sreewed up when the mounted back everything.
In Sweden it is a warranty thing and if your car is out of warranty you only have to pay a fraction of the cost.
 

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Do you know whether they had to drop the engine or did they do it on the spot?
Mine was done inside a few hours. Done from the top. The TSB had details on whether the mount was necessary or a new coolant tank (if the cause is a bad sensor built into the tank). It's a try-and-see type of thing, if I recall. My SA showed me the bulletin on his screen.
 

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Discussion Starter #7
Is your car a late 2017 or early 2018 build?

Mine is, and there is a TSB for coolant warning anomalies. In my case, it was a false low-level warning. The fix was the installation of a new support for a connector that was prone to giving intermittent signals.
12/17.

I'll take it in next week and see what they say. I really hope they don't have to drop the engine.

BTW, I don't know if it went into Limp Mode or not. I only had a couple of turns that I crawled through to get off the track.
 

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12/17.

I'll take it in next week and see what they say. I really hope they don't have to drop the engine.

BTW, I don't know if it went into Limp Mode or not. I only had a couple of turns that I crawled through to get off the track.
You're definitely in the window. Mine was an August 2017 build. Be sure to ask about the TSB. Dropping the engine is only necessary if the tank sensor is the problem.
 

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I got this same message. Just before the 39k mile mark. I did some reading on the 911 forums, lots of them get this message and it is fixed by replacing the changeover valves in the vacuum system.

Took it to the dealer, 1 COV replaced under warranty and everything is good.
 

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^ thanks, sorry I wasn't clear.
I'm not familiar with the function of the changeover valve as it relates to the cooling system.?
 

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From my limited understanding reading the 991 (our cars likely similar) forums, there are multiple COVs that are connected to the vacuum lines. One of them has to do with the coolant shutoff, but if any fail it may trigger the cooling system fault message.

And yeah, COV == changeover valve
 
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