Porsche Club GB

ABS and PSM

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4 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis

THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

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YOUR RESEARCHABS and PSM

Leading reported evidence

Check will save you a lot of grief

Suggestion or failed attempt

No successful repair reported for this finding.

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Reported fixes: 0
Unsuccessful attempts: 1
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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.

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Suggestion
A diagnostic check will save you a lot of grief.
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ABS and PSM

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Leading evidence: 'Check will save you a lot of grief' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check will save you a lot of grief' (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.

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1 matching discussions · 4 captured posts examined · 0 partial discussions

Frequently discussed actions (1)

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Check will save you a lot of grief

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
A diagnostic check will save you a lot of grief.
Original post Read captured discussion
ABS and PSM

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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.

4 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.

Porsche Club GB: 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: 20261026T163944Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

I've been looking at the various posts on this subject. My C4S has developed the habit of showing a fault message on screen plus warning lights after having been driven a few miles, so warmed up, parked for an hour or two then driven for 15 mins or so. So far it's happened on straight fast roads ie motorway or dual carriageways, not under braking. It clears when ignition is turned off and on again, and usually remains off for the remaining journey. Any clues there for someone with better skills than me? I can of course book it in for diagnosis, but if it he above gives a clear pointer I'll have a go myself.

POST 2Original post

Common causes are a brake light switch, ABS sensor, or MAF sensor. A faulty brake light switch might not always manifest itself whilst braking, nor are the brake lights working perfectly a good indicator. There are 2 sets of contacts in the switch, and either of them failing can cause the problem. An under/over-reading MAF sensor can also cause the problem, but it usually occurs during heavy acceleration. A diagnostic check will save you a lot of grief.

POST 3 / ORIGINAL POSTEROriginal post

Thanks Richard. Off to Paragon then as they are just up the road from me...

POST 4 / ORIGINAL POSTEROriginal post

And you were right Richard, brake light switch according to Paragon, now fixed.

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