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Low RPM, intermittent low voltage. - 986 Forum - The Community for Porsche Boxster & Cayman Owners

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YOUR RESEARCHLow RPM, intermittent low voltage. - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Reported or suspected cause

only

Reported cause

No successful repair reported for this finding.

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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
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Reported cause · Original poster

The problem is only with the low RPM when I stop, this deep is only one second.

Original post Read captured discussion
Low RPM, intermittent low voltage. - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Frequently discussed work

Check &

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Suggestion

also check & clean connectors at the alternator, battery & main ground points.

Original post Read captured discussion
Low RPM, intermittent low voltage. - 986 Forum - The Community for Porsche Boxster & Cayman Owners
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Leading evidence: 'only' (1 discussions report identifying this cause; no attributable repair resolution). Across 1 matching discussions, the most frequently mentioned possible cause is 'only' (1 discussions; 1 report identifying it and 0 suggest it). The most frequently discussed action is 'Check &' (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.

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1 matching discussions · 5 captured posts examined · 0 partial discussions

Compare 4 other evidence results

when i stop the rpm

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

The problem is when I stop the rpm for a couple of seconds deep to 400 rpm returning to 750 - 800 rpm.

Original post Read captured discussion
Low RPM, intermittent low voltage. - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Test with load

Performed · outcome unconfirmed

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 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

The battery is in good condition, tested with load.

Original post Read captured discussion
Low RPM, intermittent low voltage. - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Check &

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

also check & clean connectors at the alternator, battery & main ground points.

Original post Read captured discussion
Low RPM, intermittent low voltage. - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Check belt

Suggestion or failed attempt

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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

I would have it tested and check your belt.

Original post Read captured discussion
Low RPM, intermittent low voltage. - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Frequently discussed actions (9)

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

Check &

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

also check & clean connectors at the alternator, battery & main ground points.

Original post Read captured discussion
Low RPM, intermittent low voltage. - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Check belt

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

I would have it tested and check your belt.

Original post Read captured discussion
Low RPM, intermittent low voltage. - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Clean connectors at the alternator, battery & main ground points

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

also check & clean connectors at the alternator, battery & main ground points.

Original post Read captured discussion
Low RPM, intermittent low voltage. - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Clean mass air flow sensor

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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 · Original poster

Clean the MAF sensor and change the O2 sensor 6 months ago.

Original post Read captured discussion
Low RPM, intermittent low voltage. - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Replace belt

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

replace your belt?

Original post Read captured discussion
Low RPM, intermittent low voltage. - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Replace brakes

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 · Original poster

Last week change plugs, belt, water pump, air filter, oil change, brakes.

Original post Read captured discussion
Low RPM, intermittent low voltage. - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Replace o2 sensor 6 months ago

No successful repair reported for this finding.

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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

Clean the MAF sensor and change the O2 sensor 6 months ago.

Original post Read captured discussion
Low RPM, intermittent low voltage. - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Replace plugs, belt, water pump, air filter, oil

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

Last week change plugs, belt, water pump, air filter, oil change, brakes.

Original post Read captured discussion
Low RPM, intermittent low voltage. - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Test with load

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

The battery is in good condition, tested with load.

Original post Read captured discussion
Low RPM, intermittent low voltage. - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Reported and suspected causes (2)

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

only

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

The problem is only with the low RPM when I stop, this deep is only one second.

Original post Read captured discussion
Low RPM, intermittent low voltage. - 986 Forum - The Community for Porsche Boxster & Cayman Owners

when i stop the rpm

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

The problem is when I stop the rpm for a couple of seconds deep to 400 rpm returning to 750 - 800 rpm.

Original post Read captured discussion
Low RPM, intermittent low voltage. - 986 Forum - The Community for Porsche Boxster & Cayman Owners
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.

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

  • 986Forum: 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 everybody I have a 2002 triptonic 986 boxster with 77,000 miles, 2.7 liters. The problem is when I stop the rpm for a couple of seconds deep to 400 rpm returning to 750 - 800 rpm. This operation cause the Bluetooth of the radio to disconnect and sometimes the PSM and anti block lights turn on for just one second. The code are not permanent and they read “Low voltage”. When this happens. The next time I start the car the code is not there. I have done the following Clean the MAF sensor and change the O2 sensor 6 months ago. Last week change plugs, belt, water pump, air filter, oil change, brakes. Olso the headlight level sensor strut support was broken an replaced. This sensor is only for the Ligths or is used in other processes? Any ideas, suggestions? I will appreciate any assistance Regards.

POST 2Original post

Did you have the battery load tested? Alternator tested? replace your belt? Above sounds like an electrical issue.

POST 3 / ORIGINAL POSTEROriginal post

The battery is in good condition, tested with load. The alternator doesn’t generated any code or light. No further test. The problem is only with the low RPM when I stop, this deep is only one second. And after that the rpm are estable in 750 - 800 rpm. Everything else looks fine. The failure in voltage has correlation with the low RPM

POST 4Original post

I would have it tested and check your belt. also check & clean connectors at the alternator, battery & main ground points. Had same problems and it was a combination of alternator & corroded connections.

POST 5 / ORIGINAL POSTEROriginal post

New development, Now I read a code 5506, “Electrical system (rate-of-turn sensor)” Is this related with the light sensor a just repair? Any assistance wil be appreciated Regards

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