4 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHABS / PSM Failure + CEL
Leading reported evidence
Check mass air flow sensor
Suggestion or failed attempt
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
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Discussions that contain suggestions
1
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Suggestion
Weirdly enough, when you get your Durametric, check the MAF sensor.
Leading evidence: 'Check mass air flow sensor' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check mass air flow sensor' (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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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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1
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Suggestion
I have seen boost leaks as well as blown wastegate diaphragms cause the symptoms you are having, It maxes out the MAF sensor but the flow doesn't make it to the engine and set off ABS/PSM warnings.
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
I have seen boost leaks as well as blown wastegate diaphragms cause the symptoms you are having, It maxes out the MAF sensor but the flow doesn't make it to the engine and set off ABS/PSM warnings.
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.
4 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Rennlist: 1 discussions
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Generation: 20261027T064914Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
After making a nice trip down to the local beach with my son, we hop back in the car and take off home. Decent throttle in 1st through to 2nd, and all of a sudden - PSM failure, followed by ABS failure lights come on. Not sure what happened as I wasn't braking. I continue to drive home. About 5 km from my house, I notice the car is not spooling properly. Under partial throttle, there is hesitation, and the Turbos are appear to be struggling to generate boost consistently. I believe I heard a pop like a backfire or two on the drive, but nothing too loud, or consistent. About 1 km from home, the CEL pops on and boost becomes more erratic, with the car lurching a bit as throttle is applied, like the Turbos can't quite figure out what to do. I didn't get the chance to push it, nor do I want to, but it did not appear to be spooling to 0.8 bar, was cutting out at 0.3-0.5 bar. Car made it home okay, and appeared to idle fine in the garage. No leaks, and the Warning lights do come on again shortly after I turned it off an then on.
After putting my little guy down, I called
@sdematt
as he is local-ish, answers my texts and has Turbo. Suspected boost leak based on the info above, but ABS/PSM failure is a weird one. Advised me to purchase a Durametric to see what the codes are saying and post here to consult the experts.
Car is an 02' non-X50 with ~36,500KM. It sat, I'm told, for a while before I purchased it last year, but had engine out maintenance done before purchase including new Clutch/RMS/Pinned Coolant lines. I've driven it probably 10 times since buying it, and am I'm hoping this is only a blown hose or faulty sensor. Durametric has been ordered, and now I wait....
*edit - Sorry, this should have gone to the 996 Turbo Forum.
Any help or thoughts are appreciated!
I have seen boost leaks as well as blown wastegate diaphragms cause the symptoms you are having, It maxes out the MAF sensor but the flow doesn't make it to the engine and set off ABS/PSM warnings.
I realize this was ages ago, but after taking the car to the shop, it was simply a loose hose that threw a MAF code, which was causing a rough idle. All sorted after a couple of hours of shop labour.
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