Porsche Club GB

PCM System error

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Original source

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

THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCHPCM System error

Reported or suspected cause

best place

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
A PST2 check should show up any faults recorded in memory, which is probably the best place to start.
Original post Read captured discussion
PCM System error

Frequently discussed work

Check carried out

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
Thanks Richard, I guess you are right, I will have to get a PST check carried out.
Original post Read captured discussion
PCM System error

Read full discussion summary

Leading evidence: 'best place' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, the most frequently mentioned possible cause is 'best place' (1 discussions; 0 report identifying it and 1 suggest it). The most frequently discussed action is 'Check carried out' (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 · 3 captured posts examined · 0 partial discussions

Compare 2 other evidence results

Check carried out

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
Thanks Richard, I guess you are right, I will have to get a PST check carried out.
Original post Read captured discussion
PCM System error

Check should show up any faults recorded in memory

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
A PST2 check should show up any faults recorded in memory, which is probably the best place to start.
Original post Read captured discussion
PCM System error

Frequently discussed actions (2)

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

Check carried out

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
Thanks Richard, I guess you are right, I will have to get a PST check carried out.
Original post Read captured discussion
PCM System error

Check should show up any faults recorded in memory

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 PST2 check should show up any faults recorded in memory, which is probably the best place to start.
Original post Read captured discussion
PCM System error

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.

best place

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
A PST2 check should show up any faults recorded in memory, which is probably the best place to start.
Original post Read captured discussion
PCM System error

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.

3 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: 20261026T165820Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

When I turn the ignition on, the radio or CD comes on as normal and then after about 10 seconds the PCM screen shows "System error: Unknown not available." Eveything works as normal - Sat Nav, phone etc but you cannot access the main radio screen until you have acknowledged the System error by pressing Confirm. It has been doing this for the last 3 or 4 days. Anyone any ideas what the problem may be? Everything seems to work so it is not a big issue just annoying. Terry

POST 2Original post

I'll start by saying I know very little about PCM, but it sounds to me like the system is looking for a device it cannot find. Has anything been tinkered with recently, or is there anything else that isn't working? Depending on the model year and PCM version, it will be connected to other systems in the car which may have an effect. A PST2 check should show up any faults recorded in memory, which is probably the best place to start.

POST 3 / ORIGINAL POSTEROriginal post

Thanks Richard, I guess you are right, I will have to get a PST check carried out. In answer to your question there have not been any changes or additions that I can think of that could be responsible. The alarm went off at 5.00am this morning, much to the joy of the neighbours, which has never happened before so I am not sure if there is a connection. Terry

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