18 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHre warning lights
Reported or suspected cause
abs sensors
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 understand it was the abs sensors that were replaced
Leading evidence: 'abs sensors' (1 discussions report identifying this cause; no attributable repair resolution). Across 1 matching discussions, the most frequently mentioned possible cause is 'abs sensors' (1 discussions; 1 report identifying it and 0 suggest it). The most frequently discussed action is 'Check on friday so will get help' (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.
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
Just to draw a line under Dave's problem, he found that the trouble was caused by a dodgy aftermarket LED 3rd brake light.
still unresolved & has them scratching their heads
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
Porscheshop did their best on Friday but my issue is still unresolved & has them scratching their heads.
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
Fitted new brake pedal switch & passed MOT...today..2 new rear Conti Sport contact2s needed to pass but given weather today rather glad to have new rear rubber.
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
Unfortunately although my MOT mechanic fitted the new switch & cleared the fault on his diagnostic device, the same fault code has come back.
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
Fitted new brake pedal switch & passed MOT...today..2 new rear Conti Sport contact2s needed to pass but given weather today rather glad to have new rear rubber.
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.
Unsuccessful attempt · Original poster
Still having my problems with trhese warning lights abs/psm after having both front brake sensors replaced but what happens i can travel up to 25miles with no faults showing then for no reason they just flash on then when you stop and remove ignition key resets it self then go another 20miles or so then it happens again.Car is running fine sweet as a nut
Replace maf only other thing is whilst in the garage
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 have the exact same problem with my 996tt has been since a remap and the lights come on when on max boost then reset by switching ignition off then restart have replaced MAF only other thing is whilst in the garage for the remap the battery went flat and they had to jump start the car.Thats when this problem started.
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.
18 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: 20261026T203514Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Around a week ago abs and psm warning lights came on on my 996 turbo then after a while extinguished themselves,then was ok for a while.Then next time of going for a drive came on again,went to have a diagnostic check no fault codes came up.Then went out again at weekend after driving for over a hour came back again,when it has been stood idle for a couple of days warning lights as i said extinguish themselves,went for another drive came on but by the time i went back over to my indy gone off no faults found.Its a bit like toothache when you arrive at the dentists chair the pain has gone.I know i have read posts before on these faults,is it a matter of waiting until they are on all the time.
Kind regards Brian
I too have the ABS/PSM warning light on my 996 02 Targa. I have had it diagnosed as the brake pedal switch. I have purchased the part. My question is how easy is it to DIY fit? I have very limited technical ability!!
The switch unclips from the bracket with a bayonet (1/4 turn) action. It is a bit awkward to get to, as it is buried up in the pedal box. When refitting the new switch, pull the plunger all the way out before pushing it into the bracket.
Richard,
Thanks..having pre MOT check on Friday so will get help from my friendly local mechanic if needed. Can I just say as someone new to the forum I am impressed by the level of technical knowledge & support available..invaluable to people like me who know little about the mechanics of these cars.
Fitted new brake pedal switch & passed MOT...today..2 new rear Conti Sport contact2s needed to pass but given weather today rather glad to have new rear rubber. Unfortunately although my MOT mechanic fitted the new switch & cleared the fault on his diagnostic device, the same fault code has come back. Very annoying! Will now have to take my car back to my Porsche indy to see if his Bosch unit can clear the fault. Anyone got any better ideas?
Dave S
Richard,
Porscheshop did their best on Friday but my issue is still unresolved & has them scratching their heads.
We have tried 2 x new brake light switches & still have the PSM/ABS warning light.
The fault codes are 0571 & 4340.
They are still trying to resolve this for me, & I'm taking the car back on Thursday where we will try & change the MAF sensor. Any ideas based on these codes?
Dave S
Fault code 4340
Stop light switch
Diagnostic conditions
Ignition on
Possible cause of fault
♦ Short circuit to ground/B+ or open circuit
♦ Wiring/ plug connection faulty
♦ Mechanism of the stop light switch not OK
♦ Adjustment of the stop light switch not OK
♦ Pressure sensor plausibility
P0571
Stop Light Switch - Signal Implausible
Diagnosis conditions
Ignition on
Possible fault cause
♦ Stop light switch
♦ Wiring harness
I think I would be looking at the wiring, to check for a short or break. The diagnostic sheets for these fault codes show all the wiring checks. If you would like a copy, drop me an email.
I have the exact same problem with my 996tt has been since a remap and the lights come on when on max boost then reset by switching ignition off then restart have replaced MAF only other thing is whilst in the garage for the remap the battery went flat and they had to jump start the car.Thats when this problem started.
Just to draw a line under Dave's problem, he found that the trouble was caused by a dodgy aftermarket LED 3rd brake light. He had replaced the rear lights with LED versions, and the raised 3rd light was faulty.
Paul - Maybe you could get the fault codes read, which would be a starting point. The DME and PSM modules will store the codes for a certain time after the light has gone out.
Thanks Richard will try and find someone local to read the codes I am in hampshire must be someone local?
Great book Richard and thanks for signing my copy at the printers
Still having my problems with trhese warning lights abs/psm after having both front brake sensors replaced but what happens i can travel up to 25miles with no faults showing then for no reason they just flash on then when you stop and remove ignition key resets it self then go another 20miles or so then it happens again.Car is running fine sweet as a nut
That makes more sense. If the indy went by the fault codes to make that diagnosis, then it could be the wiring harness to the ABS sensor(s). Porsche make a 'repair kit' for this loom, so I suspect it is a common issue.
If you had the codes, I could look them up for you, just to confirm.
This is a source reference. Confirm exact model applicability in the original material.
