Rennlist

2004 996 ABS/PSM issue

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Original source

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

THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCH2004 996 ABS/PSM issue

Leading reported evidence

Check brakes

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
Correct, they manually checked the brakes to make sure the ABS was working.
Original post Read captured discussion
2004 996 ABS/PSM issue

Read full discussion summary

Leading evidence: 'Check brakes' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check brakes' (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 · 7 captured posts examined · 0 partial discussions

Compare 3 other evidence results

Check by " mashing the brakes in the wet grass"

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 concern is that the diagnostic tool that was used could not read the ABS unit, but the ABS is still working when it is manually checked by " Mashing the brakes in the wet grass".
Original post Read captured discussion
2004 996 ABS/PSM issue

Test (mashed the brakes in wet grass) the abs worked

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
When the shop did a road test (Mashed the brakes in wet grass) the ABS worked.
Original post Read captured discussion
2004 996 ABS/PSM issue

Use could not read the abs unit

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 concern is that the diagnostic tool that was used could not read the ABS unit, but the ABS is still working when it is manually checked by " Mashing the brakes in the wet grass".
Original post Read captured discussion
2004 996 ABS/PSM issue

Frequently discussed actions (4)

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

Check brakes

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
Correct, they manually checked the brakes to make sure the ABS was working.
Original post Read captured discussion
2004 996 ABS/PSM issue

Check by " mashing the brakes in the wet grass"

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 concern is that the diagnostic tool that was used could not read the ABS unit, but the ABS is still working when it is manually checked by " Mashing the brakes in the wet grass".
Original post Read captured discussion
2004 996 ABS/PSM issue

Test (mashed the brakes in wet grass) the abs worked

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
When the shop did a road test (Mashed the brakes in wet grass) the ABS worked.
Original post Read captured discussion
2004 996 ABS/PSM issue

Use could not read the abs unit

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 concern is that the diagnostic tool that was used could not read the ABS unit, but the ABS is still working when it is manually checked by " Mashing the brakes in the wet grass".
Original post Read captured discussion
2004 996 ABS/PSM issue

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.

7 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: 20261026T052503Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

I have a 2004 C2 and the ABS/PSM light came on the other day. It happened after I did a full brake job. I thought it was one of the ABS sensors, but when I took it to a shop, the diagnostic computer could not read the ABS. When the shop did a road test (Mashed the brakes in wet grass) the ABS worked. Any suggestions?

POST 2Original post

I think the reason why, after 54 people having read your posting, no one has answered might be.. no one understands what you are talking about. ie:- (Mashed the brakes in wet grass) ??????????????????????

POST 3Original post

Hurdi I think what the op is trying to say by (Mashed the brakes in wet grass) is slammed on the brakes to manually check to see if the abs is working. As to the OP I was once told by and indy that a slipping clutch might also trigger PSM light which will trigger the ABS. I don't know if that is plausible maybe the tranny expert can chime in on that theory???? LOL

POST 4 / ORIGINAL POSTEROriginal post

Quotes source post: 10702729

Correct, they manually checked the brakes to make sure the ABS was working. The car has 29k miles and the clutch is working perfectly. My concern is that the diagnostic tool that was used could not read the ABS unit, but the ABS is still working when it is manually checked by " Mashing the brakes in the wet grass". Also, PSM button will not work. It does not light up when I press it.

POST 5Original post

Did you by chance have the tires changed at the same time as the brakes? The C4 requires pretty tight tolerances between front and rear heights. If there off, PSM and ABS will just quit until the next time your start your car...

POST 6Original post

Quotes source post: 10702882

Have the error code read first. That would make the diagnostic much easier.

POST 7 / ORIGINAL POSTEROriginal post

I did not change the tires, just the brakes. And like I said, the diagnostic tool does not read the ABS at all but the ABS activates properly.

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