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| D3 - Interior Electrics Airbags, Sensors, climate modules, instrument clusters, switches etc |
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#1
14th February 2022, 01:12 PM
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A8 D3 2003 intermitent remote unlocking issue
Had an ongoing problem with my car for a while now. Most of the time my remote lock and unlock worked fine from the keyfob.
Every once in a while it wont unlock - even though the remote is working - and I have to open the car with the key. Once the door is unloacked by key and opened the remote will imediately work to lock and unlock the system. I have noticed, eventually, on the times where I have had to unlock with the key, the battery monitor is always at 10%. This will then gradually charge back to 100% over the next 40 to 60 minutes drive. I always starts just fine at 10% On good days where the remote unlocks the car the battery monitor is always showing 100% - even after being parked for a few days. Any ideas what could be draining the battery whilst parked and causing the remote unlock to fail? 
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#2
14th February 2022, 01:38 PM
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Sounds like an intermittent fault draining the battery. If you have access to VCDS or other scan tool, it should identify if a door handle (most likely) or something else is causing the drain.
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2001 A8 D2 FL 3.7 Q - LPG Conversion, Engine: AKC, Gearbox:FBB, Colour:LY5X Aqua Blue pearl effect, Interior:WJ light beige/dark beige valcona leather with burr walnut inserts My DIY jobs - Replaced alarm horn, Replaced Coolant Temp sensor, Updated RNS-D firmware, Installed Reversing Camera and Digital TV, Dashcam Installation, Retrofitted Rear Blinds, Auto-Dimming Rear View Mirror, Chrome Boot Struts Sold!  2008 S8 D3 5.2 V10 - Engine: BSM, Gearbox:KLW, Colour:LY7F Suzuka Grey Pearl Effect, Interior:Black/Black with Silver/Black valcona leather with carbon atlas inserts, Bang & Olufsen, Heated windscreen, Soft-close doors, TV, DAB, AMI, Quad Zone, Auto Boot, Auto dim Mirrors, Keyless entry, PDC with rearview camera, AFS II HeadlightsMy DIY jobs - Fan Jet Windscreen Washers, Retrofitted Electric Side Blinds
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#3
22nd February 2022, 08:40 AM
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These are my codes (cut down to just faults). The window regulators all went wrong on a very cold morning after not being used for ages becuase of lockdowns. I think a lot of the intermittent battery warnings were when I disconnected one terminal of the battery?
When I pulled these codes I turned off the radio and the heater/AC. There was an occasional clicking from the dash or perhaps under the bonnet. I thought maybe a heater flap type sound? Only with ignition on though. Monday,21,February,2022,17:14:22:16365
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 2003 A8 D3 V8 3.7l petrol - retro fit audi handsfree bluetooth, DAB Radio, Digital TV, fully populated aerial amp, metal capped window and handbrake switches, brushed metal dash trim and switches, graphic parking sensor display
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#4
22nd February 2022, 09:09 AM
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Some of those (I haven't been through in detail) look old based on date/mileage.
What reappears if you clear all the codes check immediately, use the car for a short while and check again?
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2003 D2 FL S8. Irish Green Pearl/Beige. Solar sunroof, auto-dim mirrors, electric rear seat functions, ski hatch retrofit; extended leather. Aftermarket DVB-T, reversing camera and full XCarlink (Bluetooth etc.). 2016 Volvo V40 T5 Cross Country (4WD) with ALL the toys including adaptive cruise etc. etc. Osmium Grey with Blonde/Charcoal leather interior. Polestar performance "optimisation".  (A much rarer model than a D2 S8 by the way!) Oh, and a brand new engine at just under 30,000 miles on the factory one!  Finally: gone, but not forgotten..... 1998 D2 PF S8. AgateGrey/Platinum. Every option (I think) except electric rear seats, tiptronic steering wheel, ski hatch, towbar & dimming door mirrors. e.g. Cruise control, NavPlus/TV, Bose, GSM, Xenons, Solar roof, Parking sensors, Alcantara/leather everywhere of course.  (internal dimming mirror added later)1998 (very early) Ford Focus 1.8 Zetec; ABS/TCS, Heated screen/mirrors, Aircon, Auto-dim mirror, Leather, Trip computer, Cruise control, OEM Ford SatNav with CD changer. And before that a lot of Rover 800s, a few oddities, a lovely Triumph Dolomite 1850HL with Overdrive and way back in my schooldays an Austin Seven aka Mini 850! 
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#5
22nd February 2022, 01:47 PM
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HPsauce beat me to it, but it's perhaps something I should have suggested in my previous post. Follow what he said and post your results, and then we can go from there.
Not knowing which codes are relevant to your issue now just gives us more red herrings to eliminate.
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2001 A8 D2 FL 3.7 Q - LPG Conversion, Engine: AKC, Gearbox:FBB, Colour:LY5X Aqua Blue pearl effect, Interior:WJ light beige/dark beige valcona leather with burr walnut inserts My DIY jobs - Replaced alarm horn, Replaced Coolant Temp sensor, Updated RNS-D firmware, Installed Reversing Camera and Digital TV, Dashcam Installation, Retrofitted Rear Blinds, Auto-Dimming Rear View Mirror, Chrome Boot Struts Sold! 2008 S8 D3 5.2 V10 - Engine: BSM, Gearbox:KLW, Colour:LY7F Suzuka Grey Pearl Effect, Interior:Black/Black with Silver/Black valcona leather with carbon atlas inserts, Bang & Olufsen, Heated windscreen, Soft-close doors, TV, DAB, AMI, Quad Zone, Auto Boot, Auto dim Mirrors, Keyless entry, PDC with rearview camera, AFS II HeadlightsMy DIY jobs - Fan Jet Windscreen Washers, Retrofitted Electric Side Blinds
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#6
22nd February 2022, 05:09 PM
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There always are codes from flat/disconnected batteries but you also have some that are showing incorrectly coded/no basic settings/component protection.
As said by the previous two posts, clear them all and see which ones are current
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2008 (facelift) S8 with B&O, ACC, glass sunroof, reversing camera, front and rear heated seats, ceramic brakes, homelink, electric side and rear blinds, ski load through, heated fan washer jets, remote boot closing, de-flapped manifold, fridge, umbrella holder
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