A8 Parts Forum  

Go Back   A8 Parts Forum > A8 D2 > D2 - Interior Electrics

D2 - Interior Electrics Airbags, Sensors, climate modules, instrument clusters, switches etc

Reply
 
Thread Tools Display Modes
  #1  
Old 8th July 2014, 05:04 PM
fletberbill fletberbill is offline
Member
 
Join Date: Apr 2014
Location: Wrexham
Posts: 37
Default Speedo has packed up

Hi all. a couple of weeks ago my speedo packed up on a short trip and then started working again.

Well this morning it has decided to pack up again and the same on the way home from work.

Also since the speedo packed up my fuel gauge seems to be fluctuating up and down slowly.

Any help much appreciated.

Oh yeah it's a PF 4.2 on a 99 plate
Reply With Quote
  #2  
Old 11th May 2015, 07:45 AM
ahd91 ahd91 is offline
Member
 
Join Date: Mar 2015
Posts: 38
Default

Sorry to revive an old thread, but I'm having this issue too. On first switch-on, the fuel gauge fluctuates, and the speedo is dead. Once the car is warm, fuel gauge dies altogether, and the speedo springs back into life.
Reply With Quote
  #3  
Old 11th May 2015, 08:07 AM
andycaca andycaca is offline
Senior Member
 
Join Date: Jun 2014
Posts: 189
Default

dodgy earth?
what does a scan with VCDS tell you?
__________________
2001 S8 D2
Reply With Quote
  #4  
Old 11th May 2015, 09:22 AM
ahd91 ahd91 is offline
Member
 
Join Date: Mar 2015
Posts: 38
Default

Not been able to scan it yet; booking in at some point this week.
Reply With Quote
  #5  
Old 11th May 2015, 11:19 AM
Dave McB Dave McB is offline
Senior Member
 
Join Date: Jun 2012
Location: Glasgow(ish)
Posts: 291
Default

I know that on BMW's the speedo doesn't work if theres an abs issue..

Could this be the same??
Reply With Quote
  #6  
Old 11th May 2015, 11:38 AM
ahd91 ahd91 is offline
Member
 
Join Date: Mar 2015
Posts: 38
Default

I could certainly see how the ABS wheel speed sensor could affect the speedo - but I don't see how this would also affect the fuel gauge?

I can live with no speedo for a couple of mins, but as things are I'm going to have to keep a record of what fuel is in the car, how far I've travelled, and hope that the MPG readout is somewhere near accurate.
Reply With Quote
  #7  
Old 11th May 2015, 12:52 PM
Architex_mA8tey's Avatar
Architex_mA8tey Architex_mA8tey is offline
Moderator
 
Join Date: Jan 2009
Location: London/Oxford/Swindon
Posts: 7,648
Default

I can confirm that ABS ECU issues can stop the Speedo working as I have seen this recently on a D3 and I would imagine it is the same on a D2. Heat from the engine can also cause the ECU circuit board to not make good contact soldering wise on some engines, depending on where the ECU is located.
__________________

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
Reply With Quote
  #8  
Old 11th May 2015, 02:28 PM
ahd91 ahd91 is offline
Member
 
Join Date: Mar 2015
Posts: 38
Default

Will get it scanned ASAP then.

Just disconnected the battery and left for 10 mins. This appears to have temporarily fixed things.
Reply With Quote
Reply


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT. The time now is 05:37 AM.


Powered by vBulletin® Version 3.8.0
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.