5 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHReocuuring P2096 Error code - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Leading reported evidence
Check pass
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
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.
Reocuuring P2096 Error code - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Read full discussion summary
Leading evidence: 'Check pass' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check every possible other cause, including' (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
- spark plugs removed and inspected, no evidence of lean running on either bank, nor any injector issues
Reocuuring P2096 Error code - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Inspect pass
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.
Reocuuring P2096 Error code - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Inspect whole exhaust system, both cold and hot
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
I appreciate the exhaust leak suggestions as forum research tell me it is usually the probable cause, but two different garages have had the car on their ramps and thoroughly inspected the whole exhaust system, both cold and hot, with the Indy also doing a thorough smoke test on the exhaust system.
Reocuuring P2096 Error code - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Replace with new bosch sensors
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
On the first occasion, about a year and 1500 miles ago, the 4 O2 sensors were replaced with new Bosch sensors.
Reocuuring P2096 Error code - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Check small exhaust leak
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
I would still check for a small exhaust leak after the pre-cat O2 sensor since it may only show when hot, watch live O2 readings over a longer drive for any slow or drifting response and if that looks normal, consider a bank 1 injector balance issue under load as a possible cause.
Reocuuring P2096 Error code - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Inspect whole exhaust system, both cold and hot
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
I appreciate the exhaust leak suggestions as forum research tell me it is usually the probable cause, but two different garages have had the car on their ramps and thoroughly inspected the whole exhaust system, both cold and hot, with the Indy also doing a thorough smoke test on the exhaust system.
Reocuuring P2096 Error code - 986 Forum - The Community for Porsche Boxster & Cayman Owners
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.
5 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
986Forum: 1 discussions
0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.
1 acknowledgements have no verified action link; they do not establish a repair result.
Outcome without a verified action link
no "real" lean running at all.But I am not happy with this, and am determined to get it resolved, so my quest continues.
Help please. I am out of ideas on how to stop an occasional reoccurring CEL with a P2096 ( Post catalyst fuel trim system too lean bank 1) error code on my 2003 2.7 Boxster, FSH 72K miles.
I have owned the car nearly two years. The car has always been well maintained and is running beautifully throughout this period. Everything is working exactly as it should be.
.
The CEL/ P2096 code pops up every 150-200 miles or so, which is easy enough to clear using my Foxwell OBD2 tool, but is annoying me.
So I have on 2 occasions put it in to a highly respected local Porsche Indy, to investigate and fix.
On the first occasion, about a year and 1500 miles ago, the 4 O2 sensors were replaced with new Bosch sensors. This did not stop the occasional CEL problem.
So last week the Indy spent a couple of days checking every possible other cause, including:
- live diagnostics and live data -pass, no strange readings
- fuel rails checked and pressures checked - pass
- manometer check on vacuum system - pass,
- full visual check of exhaust system, cold and hot - pass
- spark plugs removed and inspected, no evidence of lean running on either bank, nor any injector issues
- O2 sensor wiring checks - pass; and plug connectors checked cleaned
- air filter check -pass
- Engine bay pipework inspection - pass
- smoke tests of intake system, vacuum system, AOS, Exhaust system warm & cold - pass
- Fuel cap and oil cap seals, fuel vent check - pass
- MAF sensor inspected - pass, and cleaned
We assume the CATs are ok as there are no emissions issues.
To rub salt in the would the CEL light came on again on my drive home from the Indy.
Am loathe to give up and accept that this P2096 code is may be an unsolvable "ghost" or random "cable-earth" cause, so thought I would ask this forum, anybody else had this issue and if so what was your fix please?
Rob (in South Wales)
The most common fault causing P2096 are small exhaust system leaks. If the car were in my shop, I would smoke test that bank's exhaust system for very small leaks.
I know you commented that you had the system tested, I would test it again, very carefully and with the system disconnected and plugged as the leaks can be incredibly small.
P2096 can be frustrating because it is often intermittent and can slip past basic tests. I would still check for a small exhaust leak after the pre-cat O2 sensor since it may only show when hot, watch live O2 readings over a longer drive for any slow or drifting response and if that looks normal, consider a bank 1 injector balance issue under load as a possible cause.
Many thanks for the two suggestions so far.
I appreciate the exhaust leak suggestions as forum research tell me it is usually the probable cause, but two different garages have had the car on their ramps and thoroughly inspected the whole exhaust system, both cold and hot, with the Indy also doing a thorough smoke test on the exhaust system. The Indy said sometimes the exhaust clamps can be overtightened forming a slight ovaling of the pipe under the clamps, but not in this cars case.
I have only ever used my Foxwell NT510 to clear the intermittent P2096 code, so I will investigate if I can use it to monitor the O2 live readings or injector balancing.
Thank you both for your comments.
Regretfully my 2003 2.7 boxster's intermittent P2096 error remains unresolved, still re-occurring every 200-250 miles
With the all the work and tests done to date, the upside is the knowledge that my car has a squeaky clean bill of good engine health.... no "real" lean running at all.But I am not happy with this, and am determined to get it resolved, so my quest continues.
My latest forums research has thrown up this potential fix:
"DME Software Anomaly (2003-2004 Models): If you are driving an early 986 model year (2003–2004), a known software bug in the engine computer (DME) can falsely trigger the P2096 code. If the sensor tests normal, a trip to a specialist to update the DME fuel maps may be necessary."
Hence this post and my question please, has anyone on this forum has the DME update done on their 2.7 Boxster by their Porsche dealer or any other specialist, and did it resolve their issue?
TIA, Rob
This is a source reference. Confirm exact model applicability in the original material.
