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| D4 - Common Faults Quick links to all known common faults and their solutions |
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#1
7th December 2019, 05:58 PM
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Update:
took car to well regarded local diagnostics place. Hmmm, jury is still out on them and the fault. They have traced it to a zero voltage at the drivers side door control module and had the door apart. This would make sense in terms of waking the car up. Note it is not the door handle sensors, it's apparently the door module. They have had it 4 days so far, hurry doesn't seem to be in their vocab. They haven't seen or heard anything like this before. I'll let you know how I get on...
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S8FRD 2002 D2 S8 on LPG 213K just passed MOT, again, no issues. Owned since 2007 **60*** Unicorn, 2012 D4 Havana Black, 4.2TDI ~60K miles Cream Leather, £25K of Factory extras including B+O Owned since 04/2018 
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#2
23rd February 2020, 04:36 PM
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The door module was a red herring. It was not working but not the cause of the car's insomnia/batter drain.The car returned just after new year, not fixed but problem identified as the diagnostic module 4Ho907468F. I have been running the car with this module disabled by pulling the fuse and the car has been fine. I have located a second hand one and it will be fitted when I get the chance. All that work and it turns out to be the diagnostic module not allowing the car to sleep. Time will tell whether the replacement is a full fix. Thought I'd keep this updated as there is nothing anywhere on the internet about a faulty diagnostic module or this type of battery drain.
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S8FRD 2002 D2 S8 on LPG 213K just passed MOT, again, no issues. Owned since 2007 **60*** Unicorn, 2012 D4 Havana Black, 4.2TDI ~60K miles Cream Leather, £25K of Factory extras including B+O Owned since 04/2018
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#3
25th February 2020, 12:23 PM
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Quote:
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Confidence is the feeling you have before you know better . . . .  Audi A8 D2 3.7 Quattro Sport 1999 FL - Melange 2nd Place Winner - A8-Freunde Annual German Meet 2012 at Edersee 20" x 9" Bentley GTC Wheels with 385mm W12 Front Discs & Bentley Caliper Covers, Front Lowered on Coilovers, Xenons, Combined DRLs and LED Foglights to modified OEM front fog lamp position, Alcantara/Leather, Full Black Alcantara headlining + pillars and blind shelf, Bespoke Flat Bottomed Sports Steering Wheel, Dark Myrtle Wood, Autodim Mirrors, Bose, Blinds, Digital TV, Ski Hatch, Modified rear exhaust section for extra V8 Burble  Audi S8 D2 Final Edition 2002, Avus Silver with Red Leather Interior Tiptronic with Sport mode button, Sony rear entertainment package, Bose sound system, Audi Navigation Plus, 20 inch Final Edition alloys, Full Cat Back Stainless Milltek exhaust, giving a great V8 burble Audi A8L D2 4.2 Petrol with LPG - Ebony Black Audi A8L D4 FL 4.0T Petrol twin turbo - Havana Black Audi A2 1.6 FSi Sport - Dolphin Grey with Votex body kit and Red Leather Interior and some other A8's A8L's and Mercs
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