6 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHHelp diagnosing CEL
Reported or suspected cause
present and needs fixing
Reported cause
No successful repair reported for this finding.
1
Identified cause
0
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 report identifying 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.
Reported cause · Original poster
Let's assume thie issue is present and needs fixing, then I can go from there.
Leading evidence: 'present and needs fixing' (1 discussions report identifying this cause; no attributable repair resolution). Across 1 matching discussions, the most frequently mentioned possible cause is 'present and needs fixing' (1 discussions; 1 report identifying it and 0 suggest it). The most frequently discussed action is 'Clean maf this afternoon, and have' (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
I have cleaned the MAF this afternoon, and have checked all of the O2 sensor wiring and the exhausts and can't see anything obvious.
Install (brand new genuine bosch), about 1,000 miles ago
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
For info, I have new 200 cell cats from Top Gear and all 4 O2 sensors were replaced when it was fitted (brand new genuine Bosch), about 1,000 miles ago.
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
For info, I have new 200 cell cats from Top Gear and all 4 O2 sensors were replaced when it was fitted (brand new genuine Bosch), about 1,000 miles ago.
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
For info I took readings at idle and at 2.5k revs before I reset the light.
Install (brand new genuine bosch), about 1,000 miles ago
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
For info, I have new 200 cell cats from Top Gear and all 4 O2 sensors were replaced when it was fitted (brand new genuine Bosch), about 1,000 miles ago.
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
For info, I have new 200 cell cats from Top Gear and all 4 O2 sensors were replaced when it was fitted (brand new genuine Bosch), about 1,000 miles ago.
Run car without the maf plugged in (as an example)
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
I use the android app CarScanner with my Bluetooth reader and its always cleared the codes when I've run the car without the MAF plugged in (as an example)
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
I use the android app CarScanner with my Bluetooth reader and its always cleared the codes when I've run the car without the MAF plugged in (as an example)
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
Thanks both, I went out for a spin and managed to work out how to clear the light - I needed to use the app to clear the code, then switch off and on again and the light is gone.
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.
6 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: 20261027T171335Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Morning all,
The CEL came on last week, just trundling along back from B&Q when it just appeared. No symptoms other than the light so no drama I guess. I got an OBDII reader and it showed P2098 (Post-cat fuel trim). I took a reading of all sensors which is below.
Main issue is I can't clear the code. I've done it four times, ignition on, engine on, I've tried both combinations and even been for a quick drive and the light doesn't go out which is really strange. On my last reading, the scanner even said 'no codes stored". Let's assume thie issue is present and needs fixing, then I can go from there.
For info, I have new 200 cell cats from Top Gear and all 4 O2 sensors were replaced when it was fitted (brand new genuine Bosch), about 1,000 miles ago. I've read up on this code and I seem to be getting different causes, so if anyone has seen this before I'd appreciate advice. Also is there a definitive App people use with a Bluetooth OBD tool to clear codes?
Cheers
Paul
When a car has been modified i tend to struggle and as such dont really answer threads .. the mods have caught me out in the past so i stick to standard .. But ..
Couple of things though that do seem strange ..
B1 short and long term are opposite , rich one way and lean the other.
B2 is fine on short term but rich on long term .
Are the pre cat or sensors 1 switching 0.2-0.8 volts ..
Any exhaust leaks on either bank.
Maf sensor seems to be reading high if its on idle , i work in kg/h and it should be around 18 kg/h .. a conversion seems to indicate you are at 25 kg/h.
Usefull site i browse when on here ..
http://www.easterncatalytic.com/education/tech-tips/fuel-trim-can-be-a-valuable-diagnostic-tool/
Thanks, I'll go out for a spin and capture a couple of screenshots at idle and at 2500rpm.
I have cleaned the MAF this afternoon, and have checked all of the O2 sensor wiring and the exhausts and can't see anything obvious. This was the freeze frame from when the light came on:
I use the android app CarScanner with my Bluetooth reader and its always cleared the codes when I've run the car without the MAF plugged in (as an example)
Thanks both, I went out for a spin and managed to work out how to clear the light - I needed to use the app to clear the code, then switch off and on again and the light is gone.
So the light is now out, I've reset the trip so I can see how far I've gone if it comes back on again. For info I took readings at idle and at 2.5k revs before I reset the light.
Anyway, something to keep an eye on, if there are any clues in the readings below please let me know
This is a source reference. Confirm exact model applicability in the original material.
