7 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHABS/PSM fault
Reported or suspected cause
brake light switch
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
I had an intermittent abs/psm fault, read the codes and it turned out to be a brake light switch.
Leading evidence: 'brake light switch' (1 discussions report identifying this cause; no attributable repair resolution). Across 1 matching discussions, the most frequently mentioned possible cause is 'brake light switch' (1 discussions; 1 report identifying it and 0 suggest it). The most frequently discussed action is 'Recommend 30/32' (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
Mine was traced to a sticky brake light switch, which caused an intermittent fault.
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
My indy changed the wheel sensor but it continued so I fitted a wiring loom repair kit (99661295800 £83 at Bell & Colvill), fed it back up into the body beside the battery.
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.
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
Was speaking to one of the instructors who has a 997 GT3 RS who recommend 30/32.
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
My indy changed the wheel sensor but it continued so I fitted a wiring loom repair kit (99661295800 £83 at Bell & Colvill), fed it back up into the body beside the battery.
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.
911uk: 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: 20261026T135432Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Hi All,
I have an intermittent fault with the ABS and PSM which brings up two yellow warning lights in n the dash and turns these systems off. The car is a 2003 996 Turbo.
The fault occurs usually as I go over a bumpy surface in the road.
I was at a track day on Friday and Wilst out on track running hot tyre pressures front 30 and rear 32 the fault did not happen and these systems would work when required.
Back on road and presures cold front 36 rear 44 the fault is back and more regular.
Would appreciate your thoughts if anyone else has experienced something like this?
Thanks
Ben
Without a fault code reader you'll just be playing a guessing game. I had an intermittent abs/psm fault, read the codes and it turned out to be a brake light switch. 15 quid - sorted.
+1
Have you noticed which corner seems to activate it. EG. do you hit a pothole with your front right wheel and it come on?
I had a reluctor ring fail on me on the back left hand side. Easily diagnosed cos it kept putting the right hand rear brake on whilst driving.
Might be worth just having a look at the rings on all 4 corners and cleaning them up with a wire brush.
In my case is was front right, usually after hitting a bump.
Error was 'Front Right wheel sensor implausible' (or words to that effect).
It would normally clear with ignition off/on.
My indy changed the wheel sensor but it continued so I fitted a wiring loom repair kit (99661295800 £83 at Bell & Colvill), fed it back up into the body beside the battery. All fixed now.
The loom replaces the socket, mounted on the wheel carrier into which the abs sensor and pad wear indicators plug.
Front loom failure must be fairly common since there is a repair kit.
Hi Ben, I have encountered a similar problem albeit on the road. Mine was traced to a sticky brake light switch, which caused an intermittent fault. When it says both systems are off it really means it too!
As an aside, 30 and 32 hot?!!
What tyres are you running? Mine has PS2s and it runs at 36/44 hot, which is around 28/34 cold. Feels really good at that, however I only track my car once a year on average, so this may be track specific.
Thanks for your experience all. Sounds like first I need to get the errors read see if I can narrow down the fault. Anybody got a fault code reader in Surrey Hampshire who wouldn't mind taking a look?
@dynomike
Just running Pirreli P Zero road tyres. I had been running it 36/44 hot but found it struggled putting the power down exiting corners. Was speaking to one of the instructors who has a 997 GT3 RS who recommend 30/32. So I gave it ago and felt it helped and gave me more confidence in the car.
This is a source reference. Confirm exact model applicability in the original material.
