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D3 - Common Faults Quick links to all known common faults and their solutions |
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Thread Tools | Display Modes |
#11
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Fault codes are merely a tool to point you in the right direction for further diagnosis, rarely can you trust a plain fault to give a 100% diagnosis. Using live data for fuelling, air mass etc should give an indication as to the issue.
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#12
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just had vagcom on it again now its showing bank 1 and bank 2 cleared the fault and rechecked it and its showing both bank ! any suggestions ive put bg44k fuel system cleaner as a precaution
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#13
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does anyone know of a good mechanic who works on audi a8s around the blackburn area? |
#14
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If after clearing faults it comes back while on idle, then it is most likely to be vacuum leak followed by O2 sensor or Maf fault.
If it reoccurs only after part/full throttle then it could be fuel filter or fuel pressure regulator. Most of the times fuel pump just seize up and stop working but it is possible that it is worn and cannot keep up pressure. |
#15
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#16
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right changed fuel filter and its still showing the fault after reset! its now also showing cylinder 5 injector circuit malfunction! ive just remembered that i had the car recently mapped could that be causing the problem as i asked for the map to be more economical.
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#17
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Who mapped it mate? Has it just occured after this?
Cylinder 5 injector sticking could be your issue. If you can swap the injector around and see the fault follow. |
#18
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I suppose mapping could result in running lean but I would concentrate on getting injector 5 sorted out first. |
#19
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WP auto solutions remapped it via elite tuning house, it did happen once before but since ive had it mapped the light comes on everytime ive reset it ive changed the injector just to be on safe side but that fault is still showing up!
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#20
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