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Fault codes can anybody help ?

Discussion in 'A3/S3 Forum (8L Chassis)' started by macpdm, Oct 16, 2011.

  1. macpdm
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    macpdm Member

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    Thanks to Scott - forum member sc00byd00byd00 a cracking guy I have now had the fault codes read on my car.The car has been running poorly losing boost and rough idling. So can somebody help identify the problem so that I can fix it and get on with my life.I am as always very grateful for any assistance.


    VCDS Version: Release 10.6.5
    Data version: 20110930
    Sunday,16,October,2011,16:28:07:12701
    Chassis Type: 8L - Audi A3/S3
    Scan: 01 02 03 08 15 16 17 22 35 37 45 55 56 57 75 76
    VIN:
    -------------------------------------------------------------------------------
    Address 01: Engine Labels: 06A-906-032-AUM.lbl
    Part No: 06A 906 032 DK
    Component: 1.8L R4/5VT 0001
    Coding: 11500
    Shop #: WSC 06435
    VCID: 6AD02A173CE4

    5 Faults Found:

    17705 - Pressure Drop between Turbo and Throttle Valve (check D.V.!)
    P1297 - 35-00 - -
    17545 - Fuel Trim: Bank 1 (Add): System too Rich
    P1137 - 35-00 - -
    16684 - Random/Multiple Cylinder Misfire Detected
    P0300 - 35-10 - - - Intermittent
    16685 - Cylinder 1: Misfire Detected
    P0301 - 35-10 - - - Intermittent
    16686 - Cylinder 2: Misfire Detected
    P0302 - 35-10 - - - Intermittent

    Readiness: 0000 0000

    End ---------------------------------------------------------------------
    #1
  2. <tuffty/>
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    <tuffty/> Badger 5 Edition Staff Member Moderator

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    Looking at these they look related to each other...

    17705 - Pressure Drop between Turbo and Throttle Valve (check D.V.!)
    P1297 - 35-00 - -

    I think this is will come up if the boost deviation is too high in this case boost isn't reaching the ECU request... indicates a big leak...

    17545 - Fuel Trim: Bank 1 (Add): System too Rich
    P1137 - 35-00 - -

    Typically a vacuum leak contributes to this... this is the short term/idle fuel trim... if its thrown this code its sucking in air big time and has gone passed its 25% adaption limit in adding fuel... a look on block 32 will say for sure..

    16684 - Random/Multiple Cylinder Misfire Detected
    P0300 - 35-10 - - - Intermittent
    16685 - Cylinder 1: Misfire Detected
    P0301 - 35-10 - - - Intermittent
    16686 - Cylinder 2: Misfire Detected
    P0302 - 35-10 - - - Intermittent

    Normally the result of a air leak causing the afr to go rich from too much fuel so ends up with soiled plugs and multiple misfires... I suspect at some point your car has sounded like a poorly scooby...

    As you may have noticed, the common thing here is 'leak'... a big one... probably a pipe under the inlet mani somewhere... if you can't spot it then get a smoke test done...

    <tuffty/>
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  3. macpdm
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    macpdm Member

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    Thanks tuffty you clearly know your stuff I have noticed a strong smell of petrol when running rough. I am struggling with some of the terminology how do I look at block 32 and what is a smoke test ?

    Thanks again.

    Just been thinking about the last time the rough running happened and it was following a fast drive home when I had just carried out an overtake.I assume therefore the turbo was boosting pretty highly and this would indicate a leak as it must have been sucking in air ?
    Last edited by a moderator: Oct 17, 2011
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  4. <tuffty/>
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    <tuffty/> Badger 5 Edition Staff Member Moderator

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    Use VCDS (vagcom) to look at block 032 in the engine module... anyone conversant with VCDS should be able to help your here... a smoke test will reveal leaks however small by pumping smoke at a small amount of pressure into the charge air/intake system... if there is a leak (baring in mind the intake and charge air system is supposed to be sealed as its under pressure when the turbo is working) then you will see the smoke coming out of wherever it is...

    Difficult to tell whats gone but my money is on the PCV pipes under the inlet manifold... this is usually noticeable with a lot of oil deposits over the outside of everything.... remember, oil is supposed to be on the inside of the engine not the outside... any oil on the outside suggests a leak...

    <tuffty/>
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  5. SiGainey
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    SiGainey Member

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    Where are you in Cheshire? I'd be happy to take a look over the car for you if you are close :)
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  6. macpdm
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    macpdm Member

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    Looks as if you are on to something here tuffty as I also posted for an opinion elsewhere and got the following reply. Im hoping its not the coil packs as they were replaced just a couple of months ago by Audi under warranty. I believe that breather hose is a ***** to replace being under the intake manifold.

    "That looks like a mixture of a split crankcase to manifold breather hose, dirty throttle body and possibly a failed coil pack, certainly I would expect the breather hose from the crankcase vent hose T piece valve to be split."
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  7. macpdm
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    macpdm Member

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    Hey Si thats kind of you to offer but I am between jct 17 & 18 of the M6 which is Sandbach & Middlewich.
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  8. <tuffty/>
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    <tuffty/> Badger 5 Edition Staff Member Moderator

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    They aren't that difficult to replace tbh... fiddly yes but easy enough for a diy'er

    <tuffty/>
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  9. macpdm
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    macpdm Member

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    This owner pulled these pipes out from under the intake manifold are these the hoses I should be looking at ?

    [​IMG]
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  10. <tuffty/>
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    <tuffty/> Badger 5 Edition Staff Member Moderator

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    Yarp, something similar to that... that one in the pic will be a little different but the main one to look for is the one coming from the centre on the inlet mani (underneath) that feeds into the 3 way valve (pretty sure they fitted these to AUM)... it normally splits there and/or where it goes to the PCV valve coming from the block... there is a plastic elbow coming out of the block on top of the oil filter housing... this goes to a rubber t-piece that has the PCV valve in the top... the other side of this goes to a plastic pipe that connects to the rubber Y jobber on the cam cover...

    All of this 'rubber' stuff is prone to decay from oil and splitting...

    <tuffty/>
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  11. macpdm
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    macpdm Member

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    Struth I think im gonna struggle to do this myself :sadlike:
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  12. <tuffty/>
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    <tuffty/> Badger 5 Edition Staff Member Moderator

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    Its not as bad as it sounds but I guess it depends on how comfortable you are with doing these things...

    Not sure what else to suggest other than taking it to a specialist to have a look at...

    <tuffty/>
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  13. macpdm
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    macpdm Member

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    Just a quick update
    Sandip came down to see if he could help me out. He was carrying a spare Miltek DV which we swopped over because my OEM valve just felt wrong when pushing it in and out with your finger and the code read mentioned checking the DV. We went for a long drive me giving it the beans and the car was perfect no sign of hesitation or loss of power. We did note that the thermostat needs changing as the temp sender was working correctly according to the readout on the AC as Sandip had set it up. We then put the old DV back on expecting the car to play up but annoyingly it did not. In conclusion Sandip found a kink in one of the hoses and we thought it was a combination of the stat and possible faulty DV. Sandip cleaned the MAF and checked the plugs and read the codes nothing was too much trouble.

    Like a lot of people I have met on here Sandip has to be one of the nicest most genuine guys I have met in a long time and would not take a penny off me for his time or fuel. Genuinely I would be proud to call him a friend.
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