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  1. #1
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    I need some help with some fault codes please

    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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  3. #2
    Lewis583's Avatar
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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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  4. #3
    NHN
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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 crap & gundge given its a bkc, probably caked up, clean it up & check for movement, brake cleaner is good for this.

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  5. #4
    Gti Jazz Blue's Avatar
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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.
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  6. #5
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    thanks everyone, I will update you in due course.

  7. #6
    NHN
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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 crap, 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.

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