Go Back   986 Forum - The Community for Porsche Boxster & Cayman Owners > Porsche Boxster & Cayman Forums > Boxster General Discussions

Post Reply
LinkBack Thread Tools Display Modes
Old 03-11-2023, 10:23 AM   #1
Registered User
Join Date: Mar 2007
Location: Ohio
Posts: 1,970
Battery Replacement Question

Iíve got an old Diehard in the Box, and, unbelievably, that suckerís been in there since 2014. Iíve got a friend who, for a fee, allows me to winter-store the car in her garage (she heads to Florida for the season) and, while doing so, Iíve had the Ctek maintainer on the whole time. The car started fine last December when I went to move it over there, but the Ctekís been giving me a red light and indicating virtually no charge. So I guess a battery replacement is finally in order.

After 9 years, I honestly donít remember what I did last time, but I donít recall worrying about maintaining power in the system while making the battery switch. I ask because Iíve done some searches and have gotten inconsistent results on the issueómine is an í01 S if that matters. I know the radio code and can obviously reset that without a problem. But my question is: do I risk anything else by totally disconnecting the car from power for that couple minutes itíll take to switch from old to new?

I donít have the cigarette lighter attachment, but if I was worried about it, with the Ctek could I just hook it up to the post in the fuse box and some door frame metal? And, if so, do I just leave it on the same Ctek setting that I keep it on to maintain the battery over the winter? TIA

Frodo is offline   Reply With Quote
Old 03-11-2023, 11:22 AM   #2
Registered User
Join Date: Feb 2005
Location: It's a kind of magic.....
Posts: 6,021
If you have the radio code, just swap out the battery, the car will relearn the rest.
ďAnything really new is invented only in oneís youth. Later, one becomes more experienced, more famous Ė and more stupid.Ē - Albert Einstein
JFP in PA is offline   Reply With Quote
Old 03-11-2023, 02:27 PM   #3
Registered User
Join Date: Aug 2018
Location: Woodland Wa
Posts: 1,170
You can re-calibrate the E-gas but as JFP said it will relearn everything (except the radio code) on its own just fine.
There is something with the windows the one touch up down feature it has to be re-calibrated (I think) it should be in you owners manual.

Last edited by blue62; 03-11-2023 at 02:34 PM.
blue62 is offline   Reply With Quote
Old 03-15-2023, 07:39 AM   #4
Registered User
Rob175's Avatar
Join Date: Apr 2013
Location: Lincolnshire, IL
Posts: 396
I'm wondering IF there's a way to tell IF the radio has a code at all....other than disconnecting and reconnecting the battery ...then try turning on the radio?

I don't know if the "indi" tire & battery shop that I used, a few years ago, connected a jumper to the cig lighter or just changed out the old battery for a new one......all I do recall is that the radio worked fine afterwards without any fussing around.
98' Boxster
Rob175 is offline   Reply With Quote
Old 03-15-2023, 06:35 PM   #5
Registered User
Join Date: May 2014
Location: Atlanta, GA
Posts: 90
there is no programming of a battery on the 986. The car's ECU will just think its 'new' and erase your adaptive memory, so when it starts up, itll start idling and learnign the temperature outside and all, no big deal.
BrakeExpert is offline   Reply With Quote
Old 03-16-2023, 04:41 AM   #6
Registered User
Join Date: Nov 2006
Location: In the garage...
Posts: 1,673
Yep - def thinks time for a new battery and as others said very simple procedure on a 986.

That said... might throw your C-tek maintainer on another vehicle to ensure it too is not bad.

Had one couple years back make me question if I had a bad cell on a (newer) battery.

Swapped maintainers with another vehicle and problem followed maintainer.

Alas that C-tek had bitten the dust after ~12-15 years which was pretty good in my opinion.

Good luck

"Cool Prius!"
- Nobody
Burg Boxster is offline   Reply With Quote
Post Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On

All times are GMT -8. The time now is 05:57 AM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2023, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.0
Copyright 2023 Pelican Parts, LLC - Posts may be archived for display on the Pelican Parts Website -    DMCA Registered Agent Contact Page