22 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHAdvise Please?
Reported or suspected cause
steering angle sensor
Reported cause
No successful repair reported for this finding.
1
Identified cause
0
Suspected cause
0
Reported fixes
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Discussions that report identifying a cause
1
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Reported cause
Only experienced it on 2 cars and it was the steering angle sensor
Leading evidence: 'steering angle sensor' (1 discussions report identifying this cause; no attributable repair resolution). Across 1 matching discussions, the most frequently mentioned possible cause is 'steering angle sensor' (1 discussions; 1 report identifying it and 0 suggest it). The most frequently discussed action is 'Check p0102 fault' (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.
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Suggestion
This lives just above the brake pedal and is very cheap and easy to replace, thankfully.
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.
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Suggestion · Original poster
I stopped the car, switched off the engine (to reset) and on start-up and for maybe 5 minutes the lights remained "off" [
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.
22 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: 20261026T163944Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
My 2000 996 C4 has developed a fault? The PSM + ABS dashboard lights came-on yesterday on the way home from the Cotswold rally. [
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I stopped the car, switched off the engine (to reset) and on start-up and for maybe 5 minutes the lights remained "off" [
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After (as I said) several minutes and maybe a few miles they came on again? [
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Can anyone advise why this should be?
The car has recently been serviced (in fact being a "Stirling's" car has been over serviced) having covered 24,000 only and having had it's 48k last February followed by a mini-service last month.
The small service was carried out by my own local Porsche specialist Dr.Reed, and I have chosen NOT to renew my annual OPC warranty as at £900 odd quid a pop I feel this in now way assures me that I have cover for all exceptions!
I would be grateful for any input.
Many thanks in anticipation:
Bob Lovelace
that's the maf sensor, I had mine changed a few weeks ago as exactly the same thing kept happening, they tried to fix on their computer but it never worked. It was free as it's under warranty so saved about 400 quid. You can get them a lot cheaper though .
I can't see how it could be the MAF - that controls fueling & we're talking about electronic stability control / ABS faults. Besides, on a pre-facelift C2, you don't have PSM do you?
Believe it or not Nick, the MAF sensor can trigger an ABS/PSM fault light. Here is a quote from Loren at Renntech:
"Check for a P0102 fault. P0102 is the same error you will get if the MAF is unplugged. This can also cause ABS and PSM lights to come on as the DME is not sensing the PSM data and combining it with the throttle position and mass air flow readings"
PSM is far too clever for it's own good!
Obviously [
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No wonder mechanics play "replace the part" so often if all these systems are so inter-dependant. You'd have thought that Porsche could spare a few extra memory locations to allow fault code logging for specific sensors so that this dance could be avoided. OTOH, I suppose it's all revenue to their dealers parts departments (or am I being too cynical?).
Another common cause of this on pre-facelift cars is a faulty brake light switch. This lives just above the brake pedal and is very cheap and easy to replace, thankfully. They were notorious for falling to bits and immeditely cause the ABS + PSM fault lights you mentioned. Unfortunately, failure of this switch starts as an intermittent fault so it can be difficult to diagnose. Keep an eye on it and see if the next time the warning lights come on is just as you hit the brake pedal.
Hope this helps
Went to see Dr Reed yesterday and he diagnsed the MAF sensor is creating issues down-stream.
The MAF sensor showed-up as being under it's value, therefore feeding duf info to the cars electronic's.
I beieve he has it sorted.....new MAF sensor on it's way.
Cost wise do I need to lie-down?
BobL
I read a thread on piston heads a while back, someone bought one for 150 ish if I recall right. It's a 5 min job to fit yourself apparently. I can't remember where they bought it from it was something like Deutsche car or German car .
I have had the same problem for somtime, but my warning light only comes on when i accelrate hard, as in above 5000 revs, its almost like a fault when pressing the accelrator hard, as soon as you switch off then it clears, and you can drive all day and it does not come on until you accelrate hard. Any ideas? Will have it checked out soon.
Phil
The MAF sensor is about £150 from
www.eurocarparts.com
. Phil - yours could be the same problem - possibly incorrect readings from the MAF at higher air flow if it occurs at high engine speeds. It makes it more unlikely to be an ABS sensor, steering angle sensor, or brake switch.
Phil,
Thats the kiddie mate, if you stop and re-start, or get home and use again, all is well until you "give-it-some" - As soon as the car starts to get some engine revs/power the light comes-on! [
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Suspect you have the same problem mate....
Perhaps a "bulk" buy is in order? [
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Dr Reed is probably going to order from OPC Exeter, so better call him and steer him towards ECP.......[
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One thing I do suspect is that I have lost power/performance and fuel consumption is down as a result of this suspect part.[
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BobL (Bob of the curves)
I have not noticed a power problem still feels quick, I shall take it to my opc and get them to check it out, i have the warranty so lets hope its covered whatever the out come is, shall let you know, as and when.
Phil
The answer is here:
http://www.porscheclubgbforum.com/fb.asp?m=70284
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