fullymatted.
Back to search
Rennlist

PSM and ABS alight

Add to repair workspace
Open repair workspace
Original source
9 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCHPSM and ABS alight

Leading reported evidence

Inspect next week

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

I am scheduled to get the car inspected next week before I go up to Watkins Glen.

PSM and ABS alight
Frequently discussed work

Clean maf and i report back

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'll have 'em clean the MAF and I report back.

PSM and ABS alight
Read full discussion summary

Leading evidence: 'Inspect next week' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, the most frequently mentioned possible cause is 'sensor somewhere' (1 discussions; 0 report identifying it and 1 suggest it). The most frequently discussed action is 'Clean maf and i report back' (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 · 9 captured posts examined · 0 partial discussions

Compare 4 other evidence results

Install k&n filter

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

I had the same problem after I installed a K&N filter with a more efficient airbox, I have a 2001 C2 Triptonic with about 37000 miles.

PSM and ABS alight

Install k&n, i decided

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

The simplist approach since everything was good before I installed the K&N, I decided to clean the MAF wire with Carb cleaner and a q-tip.

PSM and ABS alight

sensor somewhere

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

probably a sensor somewhere.

PSM and ABS alight

Clean maf and i report back

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 · Original poster

I'll have 'em clean the MAF and I report back.

PSM and ABS alight
Frequently discussed actions (6)

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

Clean maf and i report back

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'll have 'em clean the MAF and I report back.

PSM and ABS alight

Clean maf wire

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

The simplist approach since everything was good before I installed the K&N, I decided to clean the MAF wire with Carb cleaner and a q-tip.

PSM and ABS alight

Inspect next week

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

I am scheduled to get the car inspected next week before I go up to Watkins Glen.

PSM and ABS alight

Install k&n filter

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

I had the same problem after I installed a K&N filter with a more efficient airbox, I have a 2001 C2 Triptonic with about 37000 miles.

PSM and ABS alight

Install k&n, i decided

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

The simplist approach since everything was good before I installed the K&N, I decided to clean the MAF wire with Carb cleaner and a q-tip.

PSM and ABS alight

Reset everytime i shut the engine off

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

it does reset everytime i shut the engine off, so it appears nothing permanent is going on.

PSM and ABS alight
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.

sensor somewhere

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

probably a sensor somewhere.

PSM and ABS alight
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.

9 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: 20261026T213932Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

Hi guys and gals. getting familiar with my 2002 c4s ---- loads of fun. Best P-car I've ever had. one fault comes on randomly. as i drive down a highway, the PSM/ABS warning lights come on. Once i turn the car off, it seems to reset. Any suggestions? is it bothersome and i would like to clear it up before I get to Watkins Glen for 2 days. thanks roy

POST 2Original post

was it slipping? I had that when I got stuck. do a search. Same result (both lights came on).

POST 4Original post

I had the same problem after I installed a K&N filter with a more efficient airbox, I have a 2001 C2 Triptonic with about 37000 miles. In both the Auto and manual modes the PSC and ABS both drop out during hard acceleration. My response at this point was to pull over and shut down; where both systems reset. I have talked to the local Porsche mechanics and their comment was that the PSC system is a big power draw on the electric systems and a place to start would be the alternator belt tightness or maybe a defective alternator. I checked that out with no go. One thought I had was that the ABS system is probably the initiator and without ABS signals PSC just throws a fault and shuts down. The error codes from the computer were P1128 and P1130 both not specific to the mass airflow sensor. There are generic codes that should have shown up that are specific to the MAF. The simplist approach since everything was good before I installed the K&N, I decided to clean the MAF wire with Carb cleaner and a q-tip. It worked, don't know if this helps you but I thought i would offer my experience up as a another perspective. If you do not have a code reader I would suggest buying one. I got a simple reader off of e-bay for $30 and it came with a nice set of instructions.

POST 6 / ORIGINAL POSTEROriginal post

thanks everyone for your help. since the car passed NJ inspection, i think i will just live with it. it does reset everytime i shut the engine off, so it appears nothing permanent is going on. probably a sensor somewhere. Roy

POST 8Original post

happened to mine. this doesn't throw codes, for some reason. anyway, it seems to be MAF related and i guess at some point i'll deal with it.

POST 9 / ORIGINAL POSTEROriginal post

Thanks for the advice. I am scheduled to get the car inspected next week before I go up to Watkins Glen. I'll have 'em clean the MAF and I report back. Thanks, ALL Roy

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