12 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHPSM Off and ABS warning lights
Reported or suspected cause
wheel speed sensor is
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
It's going to be heat related hence after 15 mins of driving and i suspect a wheel speed sensor is under reading at that point but without checking codes / values then there is no easy way to determine the fault .
Leading evidence: 'wheel speed sensor is' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, the most frequently mentioned possible cause is 'wheel speed sensor is' (1 discussions; 0 report identifying it and 1 suggest it). The most frequently discussed action is 'Check brake and clutch pedal switches' (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 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
Although there are some basic checks you can do yourself like checking brake and clutch pedal switches.
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
It's going to be heat related hence after 15 mins of driving and i suspect a wheel speed sensor is under reading at that point but without checking codes / values then there is no easy way to determine the 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 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'm not getting an engine check light and they clear when the car is restarted.
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
Are you cornering at the time, driving spirited, braking, changing gear , etc?
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
It's going to be heat related hence after 15 mins of driving and i suspect a wheel speed sensor is under reading at that point but without checking codes / values then there is no easy way to determine the fault .
These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.
wheel speed sensor is
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
It's going to be heat related hence after 15 mins of driving and i suspect a wheel speed sensor is under reading at that point but without checking codes / values then there is no easy way to determine the fault .
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.
12 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: 20261026T161109Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
After 15 mins driving both of these lights are coming on. I'm not getting an engine check light and they clear when the car is restarted. Is there a way to diagnose this without a scanner? Do any of the eBay OBD scanners work on 996s (mine's a 1999 C4) or do I need a Porsche specific one to read everything?
Porsche specific. Although there are some basic checks you can do yourself like checking brake and clutch pedal switches. First though I'd be a bit more specific on what/when/why they're coming on. Eg. Are you in motion when it happens or can you make it do it when stoppd, etc.
I haven't tried it any other way but they come in whilst in motion after driving for about 15 minutes. It's happened on the last 3 times I've taken it out.
I'm afraid you need a tester to read out fault codes or watch actual values of the speed sensors whilst driving to locate the fault .
It's going to be heat related hence after 15 mins of driving and i suspect a wheel speed sensor is under reading at that point but without checking codes / values then there is no easy way to determine the fault .
Pre fault code days and we had to scope each sensor and test every relay , wiring connections etc to find a fault .. huge amount of time taken doing it this way .
I will say that the driveshaft rotors on 996 are corroding badly these days .. a judder on the pedal at low speed will indicate this as the abs has kicked in at approx 10 mph due to the sensor seeing almost joined up segments due to the rust .
Not your fault but something for others to consider .
