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THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCH01/98 C2 - video of stumbling idle and help with some codes please
Leading reported evidence
Install ~$110 icv
Performed · outcome unconfirmed
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
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 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 · Original poster
P0506 (idle control at stop - this is a new code after I installed a ~$110 ICV from Ebay.
01/98 C2 - video of stumbling idle and help with some codes please
Read full discussion summary
Leading evidence: 'Install ~$110 icv' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Clean maf tonight and put the oe icv back in' (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 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 · Original poster
1691 (open circuit - the DME has been replaced by the PO for reasons I don't remember, but after 15k miles and 6-months of ownership, this is the first time this code has popped.
01/98 C2 - video of stumbling idle and help with some codes please
Use autel maxidas
Performed · outcome unconfirmed
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
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 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.
01/98 C2 - video of stumbling idle and help with some codes please
Clean maf tonight and put the oe icv back in
Suggestion or failed attempt
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
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 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 going to try cleaning the maf tonight and put the OE ICV back in.
01/98 C2 - video of stumbling idle and help with some codes please
Test original icv, i
Suggestion or failed attempt
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
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 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 bought it because when testing my original ICV, I used a 12V drill battery and thought I smoked it even though I did put it back in the car and it worked - this was more of a "let's see what happens" in the event that I did ruin the original ICV and it was just now giving out, but it didn't fix anything so am going to put the OE ICV back in later this evening).
01/98 C2 - video of stumbling idle and help with some codes please
Replace 1691 (open circuit - the dme
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 · Original poster
1691 (open circuit - the DME has been replaced by the PO for reasons I don't remember, but after 15k miles and 6-months of ownership, this is the first time this code has popped.
01/98 C2 - video of stumbling idle and help with some codes please
Test original icv, i
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
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 bought it because when testing my original ICV, I used a 12V drill battery and thought I smoked it even though I did put it back in the car and it worked - this was more of a "let's see what happens" in the event that I did ruin the original ICV and it was just now giving out, but it didn't fix anything so am going to put the OE ICV back in later this evening).
01/98 C2 - video of stumbling idle and help with some codes please
Coverage and how to read this overview
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.
1 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Rennlist: 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: 20261026T155324Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
01/98 c2
I'm chasing a rough-ish idle and attached the video here (you'll have to download it, I promise it's not a virus...). I posted about this recently but have some new codes.
The codes are:
1602 (I believe this is because my CEL bulb is burned out - have confirmed this with an active test to light the bulb w/ no luck)
1691 (open circuit - the DME has been replaced by the PO for reasons I don't remember, but after 15k miles and 6-months of ownership, this is the first time this code has popped. It was paired/installed at Porsche of the Main Line back in 2016. Only other thing to note here is that when I wash the car, water comes through the footwell at higher speeds, and only if I drive it immediately after a wash... but I don't think the DME is under the driver's seat, and I'm pretty sure the drain holes adjacent to the battery are clear)
P0102 (Maf hot film sensor - this is a new code that I haven't seen before)
P1117 (oxygen sensor heater behind after cat converter bank 2 (I've also seen a code pop for bank 1's o2 after-cat sensor, so it may be time to replace both)). Voltages for both post-cat o2's stay stuck at .08 so safe to say they're dead. bank 2's precat o2 sensor looks a tad tired as it sometimes drops to around .2 volts - bank 1 precat looks fine and hovers around .7/.8
P0506 (idle control at stop - this is a new code after I installed a ~$110 ICV from Ebay. I bought it because when testing my original ICV, I used a 12V drill battery and thought I smoked it even though I did put it back in the car and it worked - this was more of a "let's see what happens" in the event that I did ruin the original ICV and it was just now giving out, but it didn't fix anything so am going to put the OE ICV back in later this evening).
I'm going to try cleaning the maf tonight and put the OE ICV back in. The ICV should fix P0506 and hopefully the Maf will improve the idle with a cleaning, if it does I guess it's safe to assume this is maf related? Interested to see if anyone can relate to the video/idle... it doesn't miss at all throughout the power band and there's no loss in power. Overall it still runs pretty well.
TIA
Edits -
I used an Autel Maxidas to read Maf hot film... it was around 1.5V then would go up to 2.5-ish volts around 2k rpms or so - didn't test it beyond that.
My cam deviations are at 6 for bank 1 and 11/12 for bank 2. They don't change no matter what I do. I think this is an Autel problem because I'd be hard pressed to believe both variocams are out given the performance is still there. Could this be something else? worn chain guides? It definitely has a quick rattle on cold starts that last for only a second, but only when sitting overnight and the oil has drained down. The values don't change at all, ever, so think the Autel is at fault here?
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