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Discussion Starter · #1 ·
I got an error message saying the keyfob battery is low. My car is only 2 months old. I put in a new battery and the message keeps popping up when I start the car. Everything is fine and there are no problems. Pulled out the spare key and the car started up without any messages! I also have the main fob stored in a Faraday box.

I had already mentionned on this Forum that my fob had such a strong signal that it unlocked the doors as I'm walking to the car without having to put my hand under the handle. And that I was certain that the fob was in "constant communication" with the car even if safely stored above the basement garage. Even got a Faraday box to avoid draining the battery.

Searched on RL and it seems this is actually a common occurrence on 2021 and 2022 models🤷‍♂️ Others had to replace the fob battery after only a couple of months. Tried "suggestions" to get rid of the message after replacing the battery but it didn't work for me. :( Read that some are keeping their fobs "on the other side of the house"...or in "tin foil" which works like a Faraday box!!!

Anyways, I will be using the second fob for now and maybe the message on the first one will eventually disappear.
 

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I got an error message saying the keyfob battery is low. My car is only 2 months old. I put in a new battery and the message keeps popping up when I start the car. Everything is fine and there are no problems. Pulled out the spare key and the car started up without any messages! I also have the main fob stored in a Faraday box.

I had already mentionned on this Forum that my fob had such a strong signal that it unlocked the doors as I'm walking to the car without having to put my hand under the handle. And that I was certain that the fob was in "constant communication" with the car even if safely stored above the basement garage. Even got a Faraday box to avoid draining the battery.

Searched on RL and it seems this is actually a common occurrence on 2021 and 2022 models🤷‍♂️ Others had to replace the fob battery after only a couple of months. Tried "suggestions" to get rid of the message after replacing the battery but it didn't work for me. :( Read that some are keeping their fobs "on the other side of the house"...or in "tin foil" which works like a Faraday box!!!

Anyways, I will be using the second fob for now and maybe the message on the first one will eventually disappear.
So far no problems here . Macan battery did go and took about two seconds to replace. I’ll keep this in mind in case. With Macan I ignored the error message. Eventually it froze my PCM. It was if it was trying to tell me “Oh yeah take that”. The replacement battery won.
 

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Discussion Starter · #5 ·
So far no problems here . Macan battery did go and took about two seconds to replace. I’ll keep this in mind in case. With Macan I ignored the error message. Eventually it froze my PCM. It was if it was trying to tell me “Oh yeah take that”. The replacement battery won.
I don't remember if I ever replaced the Macan fob battery. Maybe once in the Boxster in 5 years! And this happens after 2 months despite doing every possibe "preventive" measures: not leaving fob in the car, always locking doors, storing fobs as far away as possible from the car, using a Faraday box to avoid constant communication, etc.

I don't mind changing battery, it's the lingering "error message" that's a pain.

On RL, I don't seem to be the only one
 

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Discussion Starter · #7 ·
I am flipping through the manual and I do not see anything regarding “clearing messages” in the pcm
The message pops up when I start the car and then disappears almost instantly. The problem is that I’ll never know when the battery is really dead…untill it is. Guess I should keep an emergency CR2032 battery on me! LOL! 🤪

I will bring it up with Porsche if it doesn’t clear by itself or if it eventually affects the second fob. Some suggested changing the battery…again. Or getting a « better » battery (renata) but I doubt that it has anything to do with the battery or its brand quality. The one i replaced in the fob what a Panasonic.
 

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Discussion Starter · #15 ·
I didn’t have that issue but I still cant remove the valet key inside the fob.
You will need to remove the key in order to eventually replace the battery. In this video, he uses the point of his screwdriver to pop it out. I didn't need to do that but looks like your keys are stubborn. :p

Good luck!

 
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