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PSM failing

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

THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCHPSM failing

Reported or suspected cause

yaw sensor

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
Another reason I suspect the yaw sensor.
Original post Read captured discussion
PSM failing

Frequently discussed work

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 · Original poster
My local shop has PIWIS so I'll see if they can check/reset the steering angle sensor.
Original post Read captured discussion
PSM failing

Read full discussion summary

Leading evidence: 'yaw sensor' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, the most frequently mentioned possible cause is 'yaw sensor' (1 discussions; 0 report identifying it and 1 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.

Read captured replies

1 matching discussions · 4 captured posts examined · 0 partial discussions

Compare 4 other evidence results

Check /

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
My local shop has PIWIS so I'll see if they can check/reset the steering angle sensor.
Original post Read captured discussion
PSM failing

Check steering angle sensor reads 0.0

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 the steering angle sensor reads 0.0 when going straight.
Original post Read captured discussion
PSM failing

Reset steering angle sensor

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
My local shop has PIWIS so I'll see if they can check/reset the steering angle sensor.
Original post Read captured discussion
PSM failing

Test wheel speed sensors

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
I have both the iCarsoft and Durametric software systems but I don't see anything in either one that allows me to test the yaw sensor or even testing the wheel speed sensors.
Original post Read captured discussion
PSM failing

Frequently discussed actions (5)

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 · Original poster
My local shop has PIWIS so I'll see if they can check/reset the steering angle sensor.
Original post Read captured discussion
PSM failing

Check steering angle sensor reads 0.0

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 the steering angle sensor reads 0.0 when going straight.
Original post Read captured discussion
PSM failing

Reset steering angle sensor

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
My local shop has PIWIS so I'll see if they can check/reset the steering angle sensor.
Original post Read captured discussion
PSM failing

Test wheel speed sensors

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 have both the iCarsoft and Durametric software systems but I don't see anything in either one that allows me to test the yaw sensor or even testing the wheel speed sensors.
Original post Read captured discussion
PSM failing

Test yaw sensor or even

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 have both the iCarsoft and Durametric software systems but I don't see anything in either one that allows me to test the yaw sensor or even testing the wheel speed sensors.
Original post Read captured discussion
PSM failing

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.

yaw sensor

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
Another reason I suspect the yaw sensor.
Original post Read captured discussion
PSM failing

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.

Rennlist: 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: 20261027T173940Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

I have a 2004 911 C4S with 137k miles on it, most of which have been mine. In the last few years my PSM has gotten more intrusive when I am driving in a spirited fashion. I've raced 911's for years so I know where the limits should be and my PSM is engaging when I am at no more than 6 or 7/10's. I have ohm-ed the wheel speed sensors and all are within spec so I am looking for an alternative cause. I'm suspecting the yaw sensor but I don't know how to test it. I have both the iCarsoft and Durametric software systems but I don't see anything in either one that allows me to test the yaw sensor or even testing the wheel speed sensors. Before I start hanging parts I'm hoping someone can guide me in diagnosing this issue. The issue initially seemed to be only on left turns but has progressed to be both left and right turns. Another reason I suspect the yaw sensor. Any help is appreciated. TIA

POST 2Original post

Check the steering angle sensor reads 0.0 when going straight. If it does not psm will not know when going around a corner and will get very confused. The steering angle sensor can only be read and calibrated with PIWIS. Durametric says it can but they are lying. Likewise PIWIS can read the yaw sensor.

POST 3 / ORIGINAL POSTEROriginal post

My local shop has PIWIS so I'll see if they can check/reset the steering angle sensor. You say PIWIS can read the yaw sensor. Does this mean I need to reproduce the PSM failure while it is connected or is there a test it can run to determine if the yaw sensor is operational? Just trying to be informed before I take the car in. Thx

POST 4Original post

I have not actually read the value from the yaw sensor. I assume it is a realtime value.

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