911uk

PSM OFF/ABS OFF warning ??

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

THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCHPSM OFF/ABS OFF warning ??

Reported or suspected cause

brake pedal switch and/or maf

Reported cause

No successful repair reported for this finding.

1
Identified cause: 0
Suspected cause: 0
Reported fixes

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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 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
I had this and it turned out to be a faulty brake pedal switch and/or MAF.
Original post Read captured discussion
PSM OFF/ABS OFF warning ??

Frequently discussed work

Check brake lights work , if no

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

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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 brake lights work , if no then switch on pedal faulty , other than that may be a faulty sensor , get an indy to read fault codes
Original post Read captured discussion
PSM OFF/ABS OFF warning ??

Read full discussion summary

Leading evidence: 'brake pedal switch and/or maf' (1 discussions report identifying this cause; no attributable repair resolution). Across 1 matching discussions, the most frequently mentioned possible cause is 'brake pedal switch and/or maf' (1 discussions; 1 report identifying it and 0 suggest it). The most frequently discussed action is 'Check brake lights work , if no' (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

Compare 3 other evidence results

Check brake lights work , if no

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 brake lights work , if no then switch on pedal faulty , other than that may be a faulty sensor , get an indy to read fault codes
Original post Read captured discussion
PSM OFF/ABS OFF warning ??

Run ) or as now, in a moderate long braking

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
For no apparent reason , the PSM and ABS turn OFF and say "GO TO WORKSHOP" - sometimes when I take the car out of the park, sometimes during a long drive ( running ) or as now, in a moderate long braking.
Original post Read captured discussion
PSM OFF/ABS OFF warning ??

Replace brake pedal switch at the same time

Suggestion or failed attempt

No successful repair reported for this finding.

0
Reported fixes: 1
Unsuccessful attempts: 1
Discussions

Read evidence and context

Discussions that report an unsuccessful attempt: 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.

Unsuccessful attempt
The reason I'm not sure which is that I had another fault which definitely was the MAF, but it didn't cure the PSM/ABS problem, so they changed the brake pedal switch at the same time.
Original post Read captured discussion
PSM OFF/ABS OFF warning ??

Frequently discussed actions (3)

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

Check brake lights work , if no

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 brake lights work , if no then switch on pedal faulty , other than that may be a faulty sensor , get an indy to read fault codes
Original post Read captured discussion
PSM OFF/ABS OFF warning ??

Replace brake pedal switch at the same time

No successful repair reported for this finding.

0
Reported fixes: 1
Unsuccessful attempts: 1
Discussions

Read evidence and context

Discussions that report an unsuccessful attempt: 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.

Unsuccessful attempt
The reason I'm not sure which is that I had another fault which definitely was the MAF, but it didn't cure the PSM/ABS problem, so they changed the brake pedal switch at the same time.
Original post Read captured discussion
PSM OFF/ABS OFF warning ??

Run ) or as now, in a moderate long braking

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
For no apparent reason , the PSM and ABS turn OFF and say "GO TO WORKSHOP" - sometimes when I take the car out of the park, sometimes during a long drive ( running ) or as now, in a moderate long braking.
Original post Read captured discussion
PSM OFF/ABS OFF warning ??

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.

brake pedal switch and/or maf

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
I had this and it turned out to be a faulty brake pedal switch and/or MAF.
Original post Read captured discussion
PSM OFF/ABS OFF warning ??

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.

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

911uk: 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: 20261027T005001Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

Hi there, For no apparent reason , the PSM and ABS turn OFF and say "GO TO WORKSHOP" - sometimes when I take the car out of the park, sometimes during a long drive ( running ) or as now, in a moderate long braking. Can it be a faulty MAF sensor or serious ABS failure ? Ideas ? PS : does Porsche Warranty covers any of these ?

POST 2Original post

check brake lights work , if no then switch on pedal faulty , other than that may be a faulty sensor , get an indy to read fault codes

POST 3Original post

If the PSM thinks the problem has gone away during self-check, the error codes are cleared and don't stay in the computer, so you need to take it to the OPC/Indy with the engine still running and the fault still showing!!!! MAF and PSM faults are generally covered under warranty, so I'd take to an OPC personally.

POST 4Original post

I had this and it turned out to be a faulty brake pedal switch and/or MAF. The reason I'm not sure which is that I had another fault which definitely was the MAF, but it didn't cure the PSM/ABS problem, so they changed the brake pedal switch at the same time.

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