11 captured repliesPartial discussion capture · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCH992 Carerra T-battery - Page 1 - 911/Carrera GT - PistonHeads UK
Leading reported evidence
Use when battery fully charged
Performed · outcome unconfirmed
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that performed work without a confirmed outcome
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Performed · outcome unconfirmed
However I keep getting a message about PCM can only be used when battery fully charged when I switch off, so not convinced it has completely gone away, time will tell.
Leading evidence: 'Use when battery fully charged' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Replace their car battery' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
Source reports, not a diagnosis or a success probability. Counts refer to discussions and can overlap.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion · Original poster
Anyone had to replace their car battery after 2 years?
Discussions that performed work without a confirmed outcome
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Performed · outcome unconfirmed
However I keep getting a message about PCM can only be used when battery fully charged when I switch off, so not convinced it has completely gone away, time will tell.
Counts describe captured discussions, not unique people or a diagnosis. Author identities are not reliably stored. Exact duplicate evidence is counted once across matching discussions; one discussion counts at most once per action/state. Multiple repairs reported together remain a combination. Suggestions and failed attempts do not establish a fix. Matches cover whole discussions and can include related faults, model variants and incomplete threads.
11 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
PistonHeads: 1 discussions
0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.
1 acknowledgements have no verified action link; they do not establish a repair result.
My lithium went on my Cayenne when 4 years old. Porsche paid in the end. The bill was £1400!
For a / year old 911 I would be having stern words as unless you know it has spent half its life flat I should last 5 years plus if agm and 10 if lithium.
Porsche don't warrant batteries on low miles - less than 6k pa - cars but I would be surprised if they stick to thr if you have stern words.
A friend recently had an issue with a Lithium battery in his 992.1 S, failed to charge/went flat. Porsche advised him there was a technical recall on some of them.
They collected the car and resolved the problem. I don't know if that was a BMS software update to the charging and/or a new battery, but worth a call to see if yours is affected and covered.
Hi not on Ctec and yes low miles always taken on a good drive every week. Initial warning was Electrical fault message in the
PCM. Car currently seems ok - in for service Friday so will see.
Thanks for replies
Mine died on the ferry over to Spain last September. It’s a 992.1 model. It’s always kept on a CTek LiFePO charger. Went into OPC on return and identified a known fault, has been kept on the charger since and so far so good. However I keep getting a message about PCM can only be used when battery fully charged when I switch off, so not convinced it has completely gone away, time will tell.
I had the battery update (recall) done on my 2023 GTS last week while it was in getting its MOT, I’ve never had an issue with the battery and I tend to hook it up to a ctek charger if I’m not going to be using it for more than a week (which is quite regularly as I work away on a rota), I do sometimes leave the car in airport carparks for up to 3 weeks and have never had a problem starting, I do remove the Dashcam and also have a noco boost pack just I case!
I also get the PCM message when I turn the ignition off and this has been the case since day 1 so I assume it’s just a generic warning.
Hi battery update - service carried out PCM recall update carried out re battery. What I noticed the battery charge showing in the binacle was 14.6 before update, after PCM update is down to 13.5 if that’s makes sense? No further warning messages.
It would seem anyone not had the PCM update needs to have it carried out.
This is a source reference. Confirm exact model applicability in the original material.
