Porsche Club GB

PSM Fault - Hydraulic unit needed?

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

THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCHPSM Fault - Hydraulic unit needed?

Reported or suspected cause

abs, psm hydraulic unit part 996 355 955 61

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
I've been told by my local specialist the problem is the ABS, PSM hydraulic unit part 996 355 955 61 which costs together with the movement sensor around £2000 +fitting.
Original post Read captured discussion
PSM Fault - Hydraulic unit needed?

Frequently discussed work

Replace 4 or 5 switches over 12 months (thankfully

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
Porsche must have replaced 4 or 5 switches over 12 months (thankfully under warranty) untill they identified it was an electrical brace or belt (probably not the technical name for it).
Original post Read captured discussion
PSM Fault - Hydraulic unit needed?

Read full discussion summary

Leading evidence: 'abs, psm hydraulic unit part 996 355 955 61' (1 discussions report identifying this cause; no attributable repair resolution). Across 1 matching discussions, the most frequently mentioned possible cause is 'abs, psm hydraulic unit part 996 355 955 61' (1 discussions; 1 report identifying it and 0 suggest it). The most frequently discussed action is 'Replace 4 or 5 switches over 12 months (thankfully' (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 · 6 captured posts examined · 0 partial discussions

Compare 2 other evidence results

Replace 4 or 5 switches over 12 months (thankfully

Performed · outcome unconfirmed

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
Porsche must have replaced 4 or 5 switches over 12 months (thankfully under warranty) untill they identified it was an electrical brace or belt (probably not the technical name for it).
Original post Read captured discussion
PSM Fault - Hydraulic unit needed?

Replace anyway only £10 plus fitting

Performed · outcome unconfirmed

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
Had the switch changed anyway only £10 plus fitting.
Original post Read captured discussion
PSM Fault - Hydraulic unit needed?

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.

Replace 4 or 5 switches over 12 months (thankfully

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
Porsche must have replaced 4 or 5 switches over 12 months (thankfully under warranty) untill they identified it was an electrical brace or belt (probably not the technical name for it).
Original post Read captured discussion
PSM Fault - Hydraulic unit needed?

Replace anyway only £10 plus fitting

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
Had the switch changed anyway only £10 plus fitting.
Original post Read captured discussion
PSM Fault - Hydraulic unit needed?

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.

abs, psm hydraulic unit part 996 355 955 61

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
I've been told by my local specialist the problem is the ABS, PSM hydraulic unit part 996 355 955 61 which costs together with the movement sensor around £2000 +fitting.
Original post Read captured discussion
PSM Fault - Hydraulic unit needed?

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.

6 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: 20261027T061840Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

Hi, I've recently joined the club and I'm having problems with a PSM, ABS warning light on my 2000 996 C4 which keeps coming on now and again. I've been told by my local specialist the problem is the ABS, PSM hydraulic unit part 996 355 955 61 which costs together with the movement sensor around £2000 +fitting. I have managed to get hold of the movement sensor. Does anybody know where I can get a Hydraulic unit 996 355 955 61 cheaper from? or has had similar problems. Many Thanks Garth

POST 2Original post

Any idea what the fault code is? If you are getting an ABS pressure sensor error 4460, it is much more likely to be a problem with the brake pedal switch. It's quite a common problem, and a cheap fix (£20-ish part and 1/2 hour to fit).

POST 3Original post

as richard says have you changed the brake pedal switch as this is a common fault and causes such lights to come on, hell of a lot cheaper than£2000 if it doesn't fix it too.

POST 4 / ORIGINAL POSTEROriginal post

Visited my local specialist yesterday, the psm and abs lights had gone out this week and no further faults were found. Had the switch changed anyway only £10 plus fitting. Fingers crossed and maybe the psm fault will be rectified. Many thanks for your posts!

POST 5Original post

Hi, I had the same problem with my 996 Turbo. Porsche must have replaced 4 or 5 switches over 12 months (thankfully under warranty) untill they identified it was an electrical brace or belt (probably not the technical name for it). However this was not under the warranty but certainly sorted the problem. One to bear in mind. Sorry not technical at all, I just drive the car. Cheers, Donald.

POST 6 / ORIGINAL POSTEROriginal post

So far so good and no further psm fault light on. Thanks for your replies!

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