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Engine Fault Codes

Discussion in 'A3/S3 Forum (8L Chassis)' started by richrich14, May 11, 2011.

  1. richrich14
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    richrich14 Member

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    [May 11, 2011]
    For some time a have repeated got the following engine fault codes when using my VAGCOM. Does anybody know what they mean? where can i access all the P reference numbers and what action should i be taking?

    17748 - Camshaft position sensor (G40) / Engine speed sensor (G28) P1340
    16487 - Shareware version. To decode all DTCs P0103 Please register/activate - intermittent
    17545 - Shareware version. To decode all DTCs P1137 Please register/activate - intermittent
    17705 - Pressure drop between turbo and throttle valve (check D.V)
    17608 - Shareware version. To decode all DTCs P0200 Please register/activate
    17947 - Shareware version. To decode all DTCs P1539 Please register/activate

    Help much appreciated
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  3. Sandip
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    Sandip Well-Known Member

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    [May 11, 2011]
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  4. richrich14
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    richrich14 Member

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    [May 11, 2011]
    Sandip, great bit of info, thanks. looks to me it could be a dodgy MAF or/and N249 valve? I replaced the MAF only 8months ago and repaired all splits a few weeks ago but still get the codes.. I shall check functionality using the log but, like most things they are intermittent problems so difficult to nail the root cause straight away. I have checked the DV previously and seems to be OK. Is it possible to perform a throttle body alignment without a licensed VAGCOM i.e just the standard version?

    I do get running issues. I get a hunt intermittently every 4 secounds, i.e idle revs drop from 850rpm to 600 and back in under a 0.5 sec. I sometimes experience, when coming up a halt (off load - hard braking or selecting neutral/coasting) the revs drop completely and sometimes engine stalls which is dangerous. Also my ESP light comes on and stays on somtimes, which could be related?
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  5. Sandip
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    Sandip Well-Known Member

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    [May 11, 2011]
    From what you've said it sounds like a dodgy MAF, disconnect it and go for a drive to see if the problem goes away. If the hunting goes away and idle becomes more stable with the MAF disconnected then you need a new MAF.

    Don't think you can align the throttle using shareware vag com, it does align itself when you put the ignition on though, you should hear a few clicks from it.
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  6. richrich14
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    richrich14 Member

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    [May 11, 2011]
    Cool thanks again i shall try disconnecting the MAF when the problem comes back again. do Europarts do MAFs?
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  7. Sandip
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    Sandip Well-Known Member

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    [May 11, 2011]
    They do but i'm not sure of the quality of them
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