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Kev62

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Hi all Help needed. I have just changed my battery from the original lead acid battery to an AGM Bosche battery. Does anyone in Oxfordshire have a PIWI system and know how to update the battery settings please.  

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On 10/17/2021 at 8:30 AM, Kev62 said:

Hi all Help needed. I have just changed my battery from the original lead acid battery to an AGM Bosche battery. Does anyone in Oxfordshire have a PIWI system and know how to update the battery settings please.  

You don’t say what MY? Coding IME is only required on some MY cars. I recently changed mine MY13 2.7 and it didn’t need coding of any sort. Yes you had to do window closing sequence but that’s just a case of opening and closing the windows. 

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6 hours ago, Ringmaster999 said:

You don’t say what MY? Coding IME is only required on some MY cars. I recently changed mine MY13 2.7 and it didn’t need coding of any sort. Yes you had to do window closing sequence but that’s just a case of opening and closing the windows. 

Interested in this. 

didn’t need coding in as much as didn’t throw up any errors or warnings ?

As far as I understand it anything with agm battery should be told when a replacement battery is fitted   This is so the car can work out the state of charge and do the “right thing”’ regarding stop/start (if I stop can I start again ) and adjust the charging as well  

its not just Porsche that have a routine for it lots (all) of manufacturers do  - they wouldn’t do it if there wasn’t sone requirement for it  

That said from what I have heard largely nobody immediately notices anything if they don’t do it but I have heard that people note the stop start (and the coasting / sailing bit of pdk’s ) don’t seem to work as they expect sometimes.  and perhaps things happen down the line (shorter battery life, or suddenly not charging etc ) who knows but surely all the manufacturers have gone to the time and expense of adding these routines one way or another (even my daughters fiat 500 had a “new battery sequence” they told me about when I replaced it - which was to tell the car it had a new battery - rather than just resetting things like windows etc  ) 

There’s a bit of insight here ( all be it bmw but he does say others are similar   ) this deceives registration and coding as separate things  I suspect Porsche have a single process since it asks you battery type, capacity, part number and serial number when you do the procedure  

https://stevesorensenmechanical.com.au/blog/battery-registration-and-programing/
 

wish I could find a definitive set of info somewhere since this seems to be a common thing 

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1 hour ago, Paul P said:

Interested in this. 

didn’t need coding in as much as didn’t throw up any errors or warnings ?

As far as I understand it anything with agm battery should be told when a replacement battery is fitted   This is so the car can work out the state of charge and do the “right thing”’ regarding stop/start (if I stop can I start again ) and adjust the charging as well  

its not just Porsche that have a routine for it lots (all) of manufacturers do  - they wouldn’t do it if there wasn’t sone requirement for it  

That said from what I have heard largely nobody immediately notices anything if they don’t do it but I have heard that people note the stop start (and the coasting / sailing bit of pdk’s ) don’t seem to work as they expect sometimes.  and perhaps things happen down the line (shorter battery life, or suddenly not charging etc ) who knows but surely all the manufacturers have gone to the time and expense of adding these routines one way or another (even my daughters fiat 500 had a “new battery sequence” they told me about when I replaced it - which was to tell the car it had a new battery - rather than just resetting things like windows etc  ) 

There’s a bit of insight here ( all be it bmw but he does say others are similar   ) this deceives registration and coding as separate things  I suspect Porsche have a single process since it asks you battery type, capacity, part number and serial number when you do the procedure  

https://stevesorensenmechanical.com.au/blog/battery-registration-and-programing/
 

wish I could find a definitive set of info somewhere since this seems to be a common thing 

Hum what you say does make sense. I always turn Stop/Start off and when it’s not being used it’s always on a Ctek so I’ve never had issues. In fact I changed the battery just as a precaution as it was the original and seven yrs old. So obviously my routine probably does help longevity of the battery.

If your a member of PCGB I would send an email to Steve Winters of Jaz fame who is the Boxster register guru 👍

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Had a look and Porsche fitted both normal wet and AGM batteries on 981's.

The PIWIS is required to select the battery type and if AGM:

"After replacing the battery, the serial number and part number as well as the battery size and
manufacturer must be entered using the PIWIS Tester under: Gateway/Maintenance/repairs/Change
battery."

Sorry, cant recommend a specialist in your area.

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Thanks to all for their help. I will update my post once the coding has been completed. For the record I have fitted the Bosh AGM battery which replaced the original OEM lead acid battery and I have had no faults as yet. 

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