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D3 - Engine Bay Everything under the bonnet |
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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 |
#2
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Added to repair sticky
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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 |
#3
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Blimey that was far too easy.... Sure the A8 4.2 is harder than that!
How's the codes now Guy? |
#4
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can i do this for my 4.2 v8 d3?
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#5
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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=- |
#6
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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 |
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