PistonHeads

991.1 Fault Cooling System - Page 1 - 911/Carrera GT - PistonHeads UK

Add to repair workspace

New repair projectOpen repair workspace

Original source

6 captured repliesPartial discussion capture · Source accounts, not a confirmed diagnosis

THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCH991.1 Fault Cooling System - Page 1 - 911/Carrera GT - PistonHeads UK

Reported or suspected cause

vacuum hoses

Reported cause

No successful repair reported for this finding.

1
Identified cause: 0
Suspected cause: 0
Reported fixes

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 report identifying a cause: 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.

Reported cause · Original poster
Turned out to a vacuum hose that had disconnected itself from the left hand exhaust pipes.
Original post Read captured discussion
991.1 Fault Cooling System - Page 1 - 911/Carrera GT - PistonHeads UK

Frequently discussed work

Check water pump is not leaking

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

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
Check the water pump is not leaking, it's a known weak spot as are the numerous solenoid valves - there's 6 or 7 from memory and sometimes its not easy to pinpoint which is at fault although the changeover valve is a good start.
Original post Read captured discussion
991.1 Fault Cooling System - Page 1 - 911/Carrera GT - PistonHeads UK

Read full discussion summary

Leading evidence: 'vacuum hoses' (1 discussions report identifying this cause; no attributable repair resolution). Across 1 matching discussions, the most frequently mentioned possible cause is 'vacuum hoses' (1 discussions; 1 report identifying it and 0 suggest it). The most frequently discussed action is 'Check water pump is not leaking' (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.

Read captured replies

1 matching discussions · 6 captured posts examined · 1 partial discussions

Compare 4 other evidence results

Disconnect itself

Performed · outcome unconfirmed

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

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 · Original poster
Turned out to a vacuum hose that had disconnected itself from the left hand exhaust pipes.
Original post Read captured discussion
991.1 Fault Cooling System - Page 1 - 911/Carrera GT - PistonHeads UK

Fill reservoir up

Performed · outcome unconfirmed

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

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
I filled the reservoir up to level with ionised water, and had the OPC check it over.
Original post Read captured discussion
991.1 Fault Cooling System - Page 1 - 911/Carrera GT - PistonHeads UK

Check water pump is not leaking

Suggestion or failed attempt

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

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
Check the water pump is not leaking, it's a known weak spot as are the numerous solenoid valves - there's 6 or 7 from memory and sometimes its not easy to pinpoint which is at fault although the changeover valve is a good start.
Original post Read captured discussion
991.1 Fault Cooling System - Page 1 - 911/Carrera GT - PistonHeads UK

Recommend their services

Suggestion or failed attempt

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

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
Would highly recommend their services
Original post Read captured discussion
991.1 Fault Cooling System - Page 1 - 911/Carrera GT - PistonHeads UK

Frequently discussed actions (4)

These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.

Check water pump is not leaking

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

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
Check the water pump is not leaking, it's a known weak spot as are the numerous solenoid valves - there's 6 or 7 from memory and sometimes its not easy to pinpoint which is at fault although the changeover valve is a good start.
Original post Read captured discussion
991.1 Fault Cooling System - Page 1 - 911/Carrera GT - PistonHeads UK

Disconnect itself

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

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 · Original poster
Turned out to a vacuum hose that had disconnected itself from the left hand exhaust pipes.
Original post Read captured discussion
991.1 Fault Cooling System - Page 1 - 911/Carrera GT - PistonHeads UK

Fill reservoir up

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

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
I filled the reservoir up to level with ionised water, and had the OPC check it over.
Original post Read captured discussion
991.1 Fault Cooling System - Page 1 - 911/Carrera GT - PistonHeads UK

Recommend their services

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

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
Would highly recommend their services
Original post Read captured discussion
991.1 Fault Cooling System - Page 1 - 911/Carrera GT - PistonHeads UK

Reported and suspected causes (1)

These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.

vacuum hoses

No successful repair reported for this finding.

1
Identified cause: 0
Suspected cause: 0
Reported fixes

Read evidence and context

Discussions that report identifying a cause: 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.

Reported cause · Original poster
Turned out to a vacuum hose that had disconnected itself from the left hand exhaust pipes.
Original post Read captured discussion
991.1 Fault Cooling System - Page 1 - 911/Carrera GT - PistonHeads UK

Coverage and how to read this overview

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.

6 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.

0 acknowledgements have no verified action link; they do not establish a repair result.

Generation: 20261026T105141Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

I was on a road trip through the Brecon Beacons when a "Fault Cooling System" visit garage message appeared. All temps were stable and the car drove as it should. A quick google reveals change over valve fault, but has anyone had this and what was the damage to your wallet?!

POST 2Original post

Parts aren't too bad (around £50-100 per valve from memory). Depends whether you need the relevant bit of loom / connector too. Labour? At least 2 hours.

POST 3 / ORIGINAL POSTEROriginal post

Thanks for that, sounds like it should be a relatively "cheap" (in Porsche terms) fix!

POST 4Original post

Galvinator said: I was on a road trip through the Brecon Beacons when a "Fault Cooling System" visit garage message appeared. All temps were stable and the car drove as it should. A quick google reveals change over valve fault, but has anyone had this and what was the damage to your wallet?! I had this recently. It must have been an air pocket somewhere. I filled the reservoir up to level with ionised water, and had the OPC check it over. It went away never to come back.

POST 5Original post

Check the water pump is not leaking, it's a known weak spot as are the numerous solenoid valves - there's 6 or 7 from memory and sometimes its not easy to pinpoint which is at fault although the changeover valve is a good start. Whoever does the work needs to be precise they create a perfect vacuum, otherwise it will throw up regular yellow warnings.

POST 6 / ORIGINAL POSTEROriginal post

All sorted. Turned out to a vacuum hose that had disconnected itself from the left hand exhaust pipes. JZM Porsche diagnosed and fixed in double quick time at an acceptable cost. Would highly recommend their services

This is a source reference. Confirm exact model applicability in the original material.