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| VCDS (aka Vagcom) For all your electronic debug / diag advice queries and mods. |
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#1
24th March 2019, 12:59 PM
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Code 00849 Aaaaarggghhhh!
My car, A2 D2 4.2 40v, is suddenly shutting off the engine, notably after being in slow moving traffic conditions. On one occasion, scanning showed an Immobiliser error which I didn't make a note of unfortunately and hasn't reared it's head since.
When scanning:Code 00849 - 031 KWP1281 * DTC definitions not found. Please refer to vehicle service manual! This code appears after each shut-down event, but it doesn't explain what it is.  When the car was recovered home (I had a disabled passenger with me), the recovery driver said he thought the car smelt hot, although I didn't notice that. Car will restart after a few minutes of enforced inactivity, but I really need to get this sorted ASAP as I have become a mobile roadblock when in traffic! Temp gauge needle never goes above 90! Hoping you guys/gals will be able to point me in a clear direction... Cheers, DailyMike.
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Current modes of transport: 2004 A8 4.0DTI Quattro 19"wheels; Silver; 109,000 miles; Been off the road for several years. Lotsa work to be done [BSold with regret:]2002 A8 4.2 (40v) Quattro Sport, 18" QS wheels; Prins LPG[/b], Silver; Black leather; newly-refurbished wheels in Anthracite...pics to follow soon! 2000 P38 Range Rover Vogue 4.6 V8 LPG, Epsom Green, fully-rebuilt engine (Top-hat liners, new camshaft for better mid-range torque); New S/S sports exhaust...SOUNDS BRILLIANT! 2014 Mondraker TrakkerR; 29-er, 30-speed gear train; rise'n'fall saddle; Mountain bike...NOT a cart-horse! "JONDOR" a 116' long, 17"6" beam Humber Barge, Built 1950, ex oil tanker, fully refurbished Gardner 6LXC engine for propulsion (one day); requires new marine gearbox; 2-cylinder Petter Diesel engine & 3-cylinder diesel auxilliary engines with 12/24v and 230/415v gensets  "JONDOR" is a slow-burn project, being converted to provide suitable accommodation for wheelchair users and their carer/family for short respite breaks. Currently moored on River Humber at Old Beverley Shipyard SOLD***2006 LWB Ford Transit 2.4 Diesel, Luton Van; Tail-lift; leaking translucent roof  SOLD***Previous vehicles: Far too many to list individually, but includes 2005 A8 D3 3.0TDI Quattro Sport; 2007 A6 3.0TDI Avant; 2005 A4 2.0 Avant; 2007 A3 2.0TDI; 7-off Citroens, Many Fords, Austin 1100 (my first car), Lotus 7, Rover SD1 3500; SAAB 9000i, SAAB 9000 turbo; BMW 530; another P38 Range Rover (the crap one with BMW 2500 diesel engine...wouldn't tow the skin off a rice-pudding!  )Daren't even mention the traumatic Morris Marina and Ital's....even an Austin Princess. Brain is now hurting somewhat, so giving up for now... Last edited by DailyMike; 24th March 2019 at 01:03 PM. Reason: Added bit about temp gauge 
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#2
24th March 2019, 01:19 PM
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Ignition switch contacts implausible - some are on and some are not when they should all be the same. Given that you mentioned you're starting it with a screwdriver, that seems entirely plausible.
I'd probably look at changing the whole ignition switch assembly - this bit: That requires dismantling the cowling, which you've probably already done, removing the steering wheel, clock spring and column stalks. Then you have to grind these two shear bolts off: Usually I'll cover the interior with some thick cloths / rags / old blanket and cut slots in the bolts with a dremel, then chisel them out. At this point its probably easier to swap the whole chunk than to try and change bits inside it.
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#3
24th March 2019, 03:49 PM
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Quote:
One of the codes I've picked-up on today stated misaligned contacts, so you're spot-on I'll A8 Parts in the morning to see if they've that "chunk" in... Enjoy what's left of the weekend and thanks again! Mike
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Current modes of transport: 2004 A8 4.0DTI Quattro 19"wheels; Silver; 109,000 miles; Been off the road for several years. Lotsa work to be done [BSold with regret:]2002 A8 4.2 (40v) Quattro Sport, 18" QS wheels; Prins LPG[/b], Silver; Black leather; newly-refurbished wheels in Anthracite...pics to follow soon! 2000 P38 Range Rover Vogue 4.6 V8 LPG, Epsom Green, fully-rebuilt engine (Top-hat liners, new camshaft for better mid-range torque); New S/S sports exhaust...SOUNDS BRILLIANT! 2014 Mondraker TrakkerR; 29-er, 30-speed gear train; rise'n'fall saddle; Mountain bike...NOT a cart-horse! "JONDOR" a 116' long, 17"6" beam Humber Barge, Built 1950, ex oil tanker, fully refurbished Gardner 6LXC engine for propulsion (one day); requires new marine gearbox; 2-cylinder Petter Diesel engine & 3-cylinder diesel auxilliary engines with 12/24v and 230/415v gensets "JONDOR" is a slow-burn project, being converted to provide suitable accommodation for wheelchair users and their carer/family for short respite breaks. Currently moored on River Humber at Old Beverley Shipyard SOLD***2006 LWB Ford Transit 2.4 Diesel, Luton Van; Tail-lift; leaking translucent roof SOLD***Previous vehicles: Far too many to list individually, but includes 2005 A8 D3 3.0TDI Quattro Sport; 2007 A6 3.0TDI Avant; 2005 A4 2.0 Avant; 2007 A3 2.0TDI; 7-off Citroens, Many Fords, Austin 1100 (my first car), Lotus 7, Rover SD1 3500; SAAB 9000i, SAAB 9000 turbo; BMW 530; another P38 Range Rover (the crap one with BMW 2500 diesel engine...wouldn't tow the skin off a rice-pudding! )Daren't even mention the traumatic Morris Marina and Ital's....even an Austin Princess. Brain is now hurting somewhat, so giving up for now...
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