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Porsche Club GB

ABS / PSM fault

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Original source
2 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCHABS / PSM fault

Reported or suspected cause

air-mass sensor - the lights

Suggestion or failed attempt

No successful repair reported for this finding.

0
Identified cause
1
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 suspect 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.

Suspected cause · Original poster

I had a vaey similar problem to this with a 2001 C4 - although the dealer was unable to fix the problem during my ownership I have since learned that the fault in my car was eventually traced to a faulty brake light switch - however during the investigations I did get a post from someone in the US who had a similar problem which was indeed traced to the air-mass sensor - the lights on mine only came on the first time I braked and would not always reset upon re-starting.

Original post Read captured discussion
ABS / PSM fault
Frequently discussed work

Reset upon re-starting

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

I had a vaey similar problem to this with a 2001 C4 - although the dealer was unable to fix the problem during my ownership I have since learned that the fault in my car was eventually traced to a faulty brake light switch - however during the investigations I did get a post from someone in the US who had a similar problem which was indeed traced to the air-mass sensor - the lights on mine only came on the first time I braked and would not always reset upon re-starting.

Original post Read captured discussion
ABS / PSM fault
Read full discussion summary

Leading evidence: 'air-mass sensor - the lights' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, the most frequently mentioned possible cause is 'air-mass sensor - the lights' (1 discussions; 0 report identifying it and 1 suggest it). The most frequently discussed action is 'Reset upon re-starting' (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 · 2 captured posts examined · 0 partial discussions

Compare 1 other evidence results

Reset upon re-starting

Suggestion or failed attempt

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 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

I had a vaey similar problem to this with a 2001 C4 - although the dealer was unable to fix the problem during my ownership I have since learned that the fault in my car was eventually traced to a faulty brake light switch - however during the investigations I did get a post from someone in the US who had a similar problem which was indeed traced to the air-mass sensor - the lights on mine only came on the first time I braked and would not always reset upon re-starting.

Original post Read captured discussion
ABS / PSM fault
Frequently discussed actions (1)

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

Reset upon re-starting

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

I had a vaey similar problem to this with a 2001 C4 - although the dealer was unable to fix the problem during my ownership I have since learned that the fault in my car was eventually traced to a faulty brake light switch - however during the investigations I did get a post from someone in the US who had a similar problem which was indeed traced to the air-mass sensor - the lights on mine only came on the first time I braked and would not always reset upon re-starting.

Original post Read captured discussion
ABS / PSM fault
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.

air-mass sensor - the lights

No successful repair reported for this finding.

0
Identified cause
1
Suspected cause
0
Reported fixes
Read evidence and context
Discussions that suspect 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.

Suspected cause · Original poster

I had a vaey similar problem to this with a 2001 C4 - although the dealer was unable to fix the problem during my ownership I have since learned that the fault in my car was eventually traced to a faulty brake light switch - however during the investigations I did get a post from someone in the US who had a similar problem which was indeed traced to the air-mass sensor - the lights on mine only came on the first time I braked and would not always reset upon re-starting.

Original post Read captured discussion
ABS / PSM fault
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.

2 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: 20261026T213932Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

I have a problem with my 996 C2 2000 'W' which is when accelerating once the rpm reaches 5000 the warning lights for both the ABS and PSM come on. The system always resets once I have stopped and removed the key and restarted and until the lights come on the system works perfectly. I don't drive the car hard at all however it is annoying knowing that something is not right. Any help would be most appreciated. P.S. It has been suggested that it may be a problem with the air mass sensor, does this sound likley?

POST 2 / ORIGINAL POSTEROriginal post

I had a vaey similar problem to this with a 2001 C4 - although the dealer was unable to fix the problem during my ownership I have since learned that the fault in my car was eventually traced to a faulty brake light switch - however during the investigations I did get a post from someone in the US who had a similar problem which was indeed traced to the air-mass sensor - the lights on mine only came on the first time I braked and would not always reset upon re-starting. Hope this helps Dave

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