A8 Parts Forum  

Go Back   A8 Parts Forum > A8 D3 > D3 - Engine Bay

D3 - Engine Bay Everything under the bonnet

Reply
 
Thread Tools Display Modes
  #1  
Old 23rd December 2012, 03:44 PM
daviesbike daviesbike is offline
Banned
 
Join Date: May 2011
Posts: 1,897
Lightbulb W12 Lambda sensor Replacement Guide

Well my Bank 1 sensor 1 on the W12 failed and caused the cell to come on emmissions below threshold ect so i changed the sensor and it took me all of about 10 mins to do so hears how i did it.


first off remove the maf sensor followed by the air box it should look like this by now ...




Next i used a pair of plumbers grips to loosen off the sensor .. then unclip it and remove .. like this





and then the new sensor





now reverse the procedure ... and bingo .. no more cell light and better mpg again

hope its help full to people who are scared of tackeling the W12 themselves .... its not such a scary beast
Reply With Quote
  #2  
Old 24th December 2012, 01:16 PM
Architex_mA8tey's Avatar
Architex_mA8tey Architex_mA8tey is offline
Moderator
 
Join Date: Jan 2009
Location: London/Oxford/Swindon
Posts: 7,648
Default

Added to repair sticky
__________________

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
  #3  
Old 28th December 2012, 01:27 PM
A8 Doc A8 Doc is offline
Senior Member
 
Join Date: Jan 2009
Location: North Yorkshire
Posts: 621
Default

Blimey that was far too easy.... Sure the A8 4.2 is harder than that!

How's the codes now Guy?
Reply With Quote
  #4  
Old 11th January 2013, 05:50 PM
carterleeds carterleeds is offline
Member
 
Join Date: Jan 2013
Posts: 40
Default

can i do this for my 4.2 v8 d3?
Reply With Quote
  #5  
Old 21st February 2013, 11:14 AM
GlynH GlynH is offline
Senior Member
 
Join Date: Jan 2009
Location: Oxfordshire
Posts: 234
Default

Interesting discovery & solution db

I had heard it could be as much as £3k to change a Lambda probe on a W12 (depending upon which one it was that had failed) as it was an engine out job...scary indeed!

Can I ask how you identified which of the 8 probes(!) it was that had failed and what fault code was reported by VCDS?

Thanks & kind regards,
-=Glyn=-
Reply With Quote
  #6  
Old 21st February 2013, 02:09 PM
daviesbike daviesbike is offline
Banned
 
Join Date: May 2011
Posts: 1,897
Default

well it was plugged into vag com and it stated bank 1 sensor 1 . but you can actually get to all 4 under the bonnet of course you have to take the air boxes out ect and to get at the rear ones its a bit tight but if you take the intake manifold off you can get at them both fairly easy.. engine out would be 4 new cats as you cant take the manifold off without the engine out i guess. but lambdas easy peezy

P2251

P0135

thats the codes i had
Reply With Quote
Reply

Thread Tools
Display Modes

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 08:15 PM.


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