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I need some help with some fault codes please

Discussion in 'A3/S3/Sportback (8P Chassis)' started by DaveA3-TDI, May 19, 2011.

  1. DaveA3-TDI
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    DaveA3-TDI Member

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    Hello.
    The emissions control light has come on yesterday on my mates 1.9 TDi A3, the car has been scanned and these are the faults we get below:

    Address 01: Engine Labels: 03G-906-016-BKC.lbl
    Part No SW: 03G 906 016 CC HW: 028 101 183 2
    Component: R4 1,9L EDC 0000SG 6231
    Revision: 12345678 Serial number: AUX7Z0E4FNJ0D8
    Coding: 0000071
    Shop #: WSC 06314 000 00000

    3 Faults Found:
    17056 - Cylinder 2 Glow Plug Circuit (Q11): Electrical Fault
    P0672 - 000 - -
    Freeze Frame:
    RPM: 966 /min
    Torque: 96.0 Nm
    Speed: 0.0 km/h
    Load: 8.2 %
    Voltage: 14.29 V
    Bin. Bits: 11000100
    Temperature: 13.5°C
    Bin. Bits: 10110000

    17058 - Cylinder 4 Glow Plug Circuit (Q13): Electrical Fault
    P0674 - 000 - -
    Freeze Frame:
    RPM: 966 /min
    Torque: 96.0 Nm
    Speed: 0.0 km/h
    Load: 8.2 %
    Voltage: 14.29 V
    Bin. Bits: 11000100
    Temperature: 13.5°C
    Bin. Bits: 10110000

    16785 - EGR System: Insufficient Flow
    P0401 - 000 - -
    Freeze Frame:
    RPM: 1344 /min
    Torque: 62.0 Nm
    Speed: 63.0 km/h
    Load: 17.3 %
    Duty Cycle: 14.7 %
    Bin. Bits: 11000000
    Mass Air / Rev.: 260.0 mg/str
    Mass Air / Rev.: 530.0 mg/str

    Readiness: 1 1 0 0 0

    The glow plug fault was cleared last time but has come back, but am I correct in thinking that the 16785 fault means the EGR valve needs replacing?

    Thanks for your help in advance.

    Dave
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  2. Lewis583
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    Lewis583 Active Member

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    More than likely yes, it wants taking off to see if it's gummed up which is restricing the movement of the valve
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  3. NHN
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    NHN Modmetractor

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    You need to check the glowplug loom for any damage, rocker cover of & have a looksy inside, if no obvious external damage, dont think there's a seperate fuse for dual glowplugs, so point to wiring in 1st instance or even the plugs themselves, when I had cover of a mates car I was surprised how flimsy or loose the plug loom connectors were, although doubtful could be they're not seated 100%.

    As lewis advised, check egr for **** & gundge given its a bkc, probably caked up, clean it up & check for movement, brake cleaner is good for this.
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  4. Gti Jazz Blue
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    Gti Jazz Blue Active Member

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    You'll probably need replacement gaskets too.
    I got through two spray cans of brake cleaner - cleaning up the EGR from my BKD.
    If you have the time it might also be worth doing the Intake Manifold as that is probably well chocked up to.
    Paul
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  5. DaveA3-TDI
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    DaveA3-TDI Member

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    thanks everyone, I will update you in due course.
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  6. NHN
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    NHN Modmetractor

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    TBH I've done 2 8P's & didnt use new gaskets, but its a fair point to make, as they can rip upon removal, wont hurt to replace.

    IM on mine when I replaced turbo was caked up with half an inch maybe more of ****, I removed the whole lot, sunk it in a cleaning liquid & scrapped areas I couldnt reach very well & it was as new when done, so certainly I'd consider doing it to give the air better surfaces to glide across.
    #6

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