15 captured repliesPartial discussion capture · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCH2001 c4 slightly dodgy idle p1130 code and cel on help pls
Reported or suspected cause
air leak or injector(s)
Reported cause
No successful repair reported for this finding.
1
Identified cause
0
Suspected cause
0
Reported fixes
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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.
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
Most likely your problem is an air leak or injector(s).
2001 c4 slightly dodgy idle p1130 code and cel on help pls
Read full discussion summary
Leading evidence: 'air leak or injector(s)' (1 discussions report identifying this cause; no attributable repair resolution). Across 1 matching discussions, the most frequently mentioned possible cause is 'air leak or injector(s)' (1 discussions; 1 report identifying it and 0 suggest it). The most frequently discussed action is 'Check any obvious leaks' (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 suspect 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.
Suspected cause
Because MAF, Fuel Pressure, and Fuel Volume would all most likely affect both banks, the more probable cause is an air leak, dodgy injector, or exhaust leak.
2001 c4 slightly dodgy idle p1130 code and cel on help pls
maf he would get p1130 and p1128
Suggestion or failed attempt
No successful repair reported for this finding.
0
Identified cause
1
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 suspect 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.
Suspected cause
But if it was the MAF he would get P1130 AND P1128.
2001 c4 slightly dodgy idle p1130 code and cel on help pls
mass air flow sensor
Suggestion or failed attempt
No successful repair reported for this finding.
0
Identified cause
1
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 suspect 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.
2001 c4 slightly dodgy idle p1130 code and cel on help pls
Check any obvious leaks
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
Check for any obvious leaks on induction and/or exhaust.
2001 c4 slightly dodgy idle p1130 code and cel on help pls
Clean ) or you have unmetered air entering the engine
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
Either your MAF is dead (they last say 50k miles and die quicker with oiling from a K&N style filter and repeated cleaning) or you have unmetered air entering the engine after the MAF or a leak in the exhaust system, or a faulty injector (fuel pressure).
2001 c4 slightly dodgy idle p1130 code and cel on help pls
Reset light
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
thanks guys ive ordered a maf just to be on the safe side i had it tested on a porsche diagnostic and i cant remember whether it was both banks or not the trouble is it takes three weeks for the light to come back on,i bought a code reader off ebay which can reset the light but i did reset it as soon as it came on the second time so the other code as you say may not have come on that soon i will put the new maf in as soon as it gets here run it for a few weeks and if it comes on the job of looking for an air leak or exhaust leak will begin.a will keep you informed of the progress and many thanks for the advise.
2001 c4 slightly dodgy idle p1130 code and cel on help pls
Run mass air flow sensor
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
thanks guys ive ordered a maf just to be on the safe side i had it tested on a porsche diagnostic and i cant remember whether it was both banks or not the trouble is it takes three weeks for the light to come back on,i bought a code reader off ebay which can reset the light but i did reset it as soon as it came on the second time so the other code as you say may not have come on that soon i will put the new maf in as soon as it gets here run it for a few weeks and if it comes on the job of looking for an air leak or exhaust leak will begin.a will keep you informed of the progress and many thanks for the advise.
2001 c4 slightly dodgy idle p1130 code and cel on help pls
air leak, dodgy injector, or exhaust leak
No successful repair reported for this finding.
0
Identified cause
1
Suspected cause
0
Reported fixes
Read evidence and context
Discussions that suspect 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.
Suspected cause
Because MAF, Fuel Pressure, and Fuel Volume would all most likely affect both banks, the more probable cause is an air leak, dodgy injector, or exhaust leak.
2001 c4 slightly dodgy idle p1130 code and cel on help pls
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.
15 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: 20261027T011819Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
my engine light comes on about every three weeks and shows code p1130 also idle revs seem a bit low and lumpy at fluctuating between about 600 and 640 can anybody point me in the right direction? i have cleaned the maf and throttle body but it has come back on.any help would be great.
thanks.
mark
P1130
Porsche fault code 361 - Oxygen Sensing Adaptation
Idle Range
Bank 2
Either your MAF is dead (they last say 50k miles and die quicker with oiling from a K&N style filter and repeated cleaning) or you have unmetered air entering the engine after the MAF or a leak in the exhaust system, or a faulty injector (fuel pressure).
The low idle is because the car is running too lean.
Any other symptoms: Smoke, smells? Do you have a performance filter/induction kit?
Still most probably the MAF. Get it tested on a diagnostics machine (PIWIS/PST2) - or stick a new one in or swap with someone's whose works (obviously it has to be the same MAF model) - if your's is fine and their's dies - QED!
Use the Audi/VW parts department or GSF/EuroCarParts etc - far cheaper than OPC. Just quote the part number on the side.
About £150.
For Cable (non-eGas <2000)
OPC 996.606.123.00
BOSCH: 0280 217 007
For eGas (Drive-by-Wire, all C4, C2 > 2000):
OPC: 996 606 124 00
BOSCH: 0 280 218 009
OPC: 996 606 125 01
BOSCH: 0 280 218 055
The above depend on the ECU software version - CHECK THE PART NO ON YOUR MAF (or call the OPC and have them confirm via chassis number etc)
Sometimes P1128 takes a few days (or drive cycles) to appear, if the MAF is dead.
That is why the MAF needs health diagnosed first.
Otherwise, the other air leaks/issues listed are probable.
Check for any obvious leaks on induction and/or exhaust.
The reason I asked about smoke or smells is that contamination of the sensors by oil or coolant can trigger a single bank error.
But if it was the MAF he would get P1130 AND P1128. If he is getting P1130 consistently, then it would indicate a problem on Bank 2 only. A problem with the MAF would affect both banks.
Because MAF, Fuel Pressure, and Fuel Volume would all most likely affect both banks, the more probable cause is an air leak, dodgy injector, or exhaust leak. You would probably hear an exhaust leak, and because the car runs rough, I think it more likely to be an air leak, as a bad injector would throw up a fault of its own.
Just saying the P1128 error may be delayed, obviously if it doesn't appear it is a P1130 problem only.
The bank 2 sensor could be defective/contaminated too.
Oh, I see what you mean. Maybe he is resetting it before it gets a chance for P1128 to come up.
I don't think it would be the O2 sensor on bank 2, as that would show an ageing fault or similar.
Are the faults being read with a Porsche tester or Durametric, or a generic code reader?
Ultimately, we appear to be trying to prioritise a number of theoretical probabilities with the same few incomplete, and currently inconclusive, details.
Have you had the bank 2 oxygen sensor output checked? It should show a zig-zag 'graph' on it's output as the ECU varies the fuel mixture according to the input it recieves from the oxygen sensor. If this is flatlining (not sensing oxygen changes), that could be the problem.
Had mine diagnosed at Sports and Classic, where they explained all the above. Changed the oxygen sensor and it steadied the idle / stopped the engine light coming on etc.
Have you had the bank 2 oxygen sensor output checked? It should show a zig-zag 'graph' on it's output as the ECU varies the fuel mixture according to the input it recieves from the oxygen sensor. If this is flatlining (not sensing oxygen changes), that could be the problem.
Had mine diagnosed at Sports and Classic, where they explained all the above. Changed the oxygen sensor and it steadied the idle / stopped the engine light coming on etc.
thanks guys ive ordered a maf just to be on the safe side i had it tested on a porsche diagnostic and i cant remember whether it was both banks or not the trouble is it takes three weeks for the light to come back on,i bought a code reader off ebay which can reset the light but i did reset it as soon as it came on the second time so the other code as you say may not have come on that soon i will put the new maf in as soon as it gets here run it for a few weeks and if it comes on the job of looking for an air leak or exhaust leak will begin.a will keep you informed of the progress and many thanks for the advise.
mark :thumb:
OK, Lloyd came back with prices for the eGas variety:
Obviously these prices may fluctuate over time/currency and how many you want.
0280 218 009 = £193 all in, inc. UK recorded post.
0280 218 055 = £225 all in, inc. UK recorded post.
This is a source reference. Confirm exact model applicability in the original material.
