https://t-design9.com/memory_module.html

and if you have a targa they make a smart module to allow you to open/close the targa top from your key fob.

That one is here:

http://www.mods4cars.com/blog/smartt...che-911-targa/

 

Dealer is blaming it on my aftermarket battery. They're quoting $764 to replace the battery and program a new OEM one. Seems a bit silly to me.

I do have a POR V2.0 scan tool with the battery programming function available to me. I suppose my best approach at this point is to try and successfully program the aftermarket battery.

 

Koala: Did it not dawn on you to tell us that you replaced your OEM battery with an aftermarket one? That little tid bit slipped your mind..

Your dealer is correct, it is your battery 100%. If you had a stock one then this wouldn't be happening. Now, the price the dealer is asking is truly absurd, so thats not an option.
I'm thinking about getting a Lithium Ion battery. If I do, I would have no problem selling you my OEM battery about a year old, but your answer lies in the battery and its voltage.

 

Doesn't it sound odd that a correctly-sized and spec'd aftermarket battery shouldn't work just fine? There are countless examples of folks on here with non-oem batteries without issue

 

The auto start/stop works off of a specific voltage connected to the battery. Its not the same as the voltage that starts the car, or powers the accessories, its specific to every car and thats how it determines when you are moving or standing still, thus starting or stopping the engine. Your AM battery may work just fine for all other auto requirements, but the auto SS will usually be the problem because of that micro voltage which is specific to your car.

If you send an email to the Vlad at T9 designs, I bet he will know the solution to your problem and the answer to the error message.
If you do get a response please do post it here so we all can learn.

NOTE: I just sent him an email with the link to this thread so lets see if he can shine some light on the problem.

 

Thank you, and thank you for taking the time to send him a note. I'm interested to learn more. This message never presented it's self for the first 6+ weeks of the new battery + 3,000 km of driving. Hoping it's an easy fix!

 

I replaced my OEM battery with a non OEM with no issue. It's for my Boxster but same engine as a Base 991.1. Since you replaced your battery, I would check the connections. Pull them off and re-land them and make sure the connections are tight.

Duracell Ultra Platinum AGM Battery for 2014 Porsche Boxster H6 3.4L 650CCA Car and Truck

PS - Porsche of New Orleans wanted to charge me $980 for a battery.

 

Car is at dealer til tomorrow dealing with transmission issues as well... My Energizer battery is I believe identical specifications to your Duracell. I'm definitely going to check the cables again! Thank you

 

Here is his response:

As other user said - this warning pop up when the conditions aren't ideal for start/stop. Most probable culprit is the battery. It would be interesting to see the voltages at the time of engine start, and at the time of message. And also to know was the A/C running and how hard?


Based on his response, it seems to be an issue with the draw seen by the auto start/stop which is why I suppose he is asking about the AC because it pulls a lot of current from the battery..

 

No AC the past few weeks, not that warm here in Alberta at this point in the year. That said, during August it hit 90F a couple of times and I certainly had AC going then.

Car is on a battery tender every night as well. I can hookup my POR V2.0 scan tool and pull voltages from that in addition to the readout from the dash - but I'd trust the scan tool more on that one.

I'll check my battery cables and go from there. Will report back for sure as it'd be great to have a "solution" for anyone else that searches this issue in the future. I'll be sure to edit my original post if I land on the actual cause of the issue.

 

There is a reason you need to do the battery programming if you have changed the size of the battery. The new battery may have a slightly lower nominal voltage. The BMS - Battery Management System has been calibrated to the original battery and is comparing what it knew as the nominal voltage for the original battery and the new battery is not presenting that voltage. The BMS then considers the battery to be functioning at reduced capacity and sacrifices the most demanding feature that is reliant on the battery...Auto Stop/Start. When I replaced the battery in the wife's XC60 the local Autozone did not have the correct AGM battery for it in stock. She was heading to the airport a couple days later so I went ahead and grabbed what they had which was slightly smaller in capacity. The car complained about the battery until I ran the BMS calibration sequence on the car. Once it knew the values for the new battery it sees it as normal and stops complaining. I suspect if you'll look up the procedure and run through the process via the POR II, if it supports it, then things will go back to working as expected.

 

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If true, I'm surprised we are not seeing more issues like this, because lots of guys here are running AGM after-market batteries without re-programming.

 

That's why the battery cables make the most sense to me. I did check them before the car went into the dealer and they looked seated correctly, but once I get the car back I'll physically disconnect and re-do them to be more certain.

Battery in question: https://www.costco.ca/Energizer-H8-A...100486791.html

At least Costco will take virtually anything back. Worst-case, I'll try a different battery. It's just hard to find alternatives to OEM here in Canada. We truly have very little selection.

 

If it were me, I would program the new battery and see if it fixes it.
I had the iCarsoft POR V2.0 tool with the BMS functionality but I couldn't get it to write the new battery info. Took it to my Indy mechanic and had him do it with the official tool.

POR II does not have BMS functionality.

Here's my post from the battery thread:
Another member used a diff tool: