A6 2.0 Diesel 2006 - idling problem

[corcoran]

Anyone ever come across an problem with the current model (2006) A6 2.0 diesel ? It idles unevenly when stopped, whether hot or cold. Dealer has replaced and updated computer to no avail.
Considered replacing it with a new model and the dealer tells me that he cannot guarantee that it will not be a problem with a new one.
Dealer has 3/4 similar cases in the last year and cannot find a resolution.
Anyone any ideas or experience of the problem?

[a8 tech]

This is down to the egr and its being investigated by the factory at this moment.Is it it multitronic gear box as well.If the egr is disconnected and the exhaust port blanked the fault is cured but this isnt advisable as you will be breaking the emmision regulations.Also its been found by altering the valve timing slightly the fault is reduced.Before all the diy mechanics chip in the egr is electronic not vac operated.Also the egr rod can break away from the flap and doesnt fully shut off.I am sure your dealer has done its best with this issue and they will be awaiting the latest software alteration.This fault is isolated to a few models within a certain production date and as far as i am aware there all a6 2.0 multitronics 2006 to 2007 chassis.Regards A8

[PhilR]

I do have some sporadic issues with my 2007 2.0 TDi multi. Interesting to hear A8s point of view.

My car does occassionally idle sporadically when cold, especially when it's in neutral. The biggest problem is that it revs high for no apparent reason. I can be almost stopped and the engine is still revving at 1500rpm. Additionally it won't seem to chage up a gear, even when i'm at 2000rpm and try to override the multi by using the paddles. Additionally it won't drop below 1500 rpm until stationery. The idle is always 1000rpm when the car is having this problem. The normal idle is about 850 rpm.

I bought the car in March and the first issue was July. Then it happened regularly, especially through September. Audi have said that it's something to do with the recharge of gases through diesel particle filter and is 'normal'. My dealer has said that they've had several other customers with the same issue. The problem seems to have gone away over the last 3 weeks or so, but this has happened before.

Not sure if this ties in with your problem or not.

[a8 tech]

yes the particulate regeneration has some bearing on this but there is a definate issue with 2.0 tdi multitronic on a6 from a certain software version of the engine control unit.There maybe and i say maybe a repair coming soon as today i spoke to some one who solved this issue with live data to the factory and the boffins down loaded a fix which resolved the fault.I am keeping my fingers crossed as one of are customers has put up with this for 9 months.This forum and others helps me to see customers issues and compare and try to resolve with the faults i see.

[PhilR]

Thanks A8 - sounds promising. I had a software update last Monday. Fingers crossed that it's sorted as I do like the multi gearbox...when it's behaving itself! You're not at Southampton Audi are you?

[a8 tech]

I wish as i would be nearer my favorite place in england (Cornwall).Northwest is my hunting ground

[mastertech]

New software is available to improve idle problems on 2.0 Tdi with multitronic--mainly idle fluctuating during warm up between40/70.C---Good reports so for.=See TPL2015457/3

[a8 tech]

Hello John,lets hope this latest tpl works

[onzarob]

I wish as i would be nearer my favorite place in england (Cornwall).Northwest is my hunting ground
We have Audi dealers down here....come and join the fun......

(sorry off topic!!!)

[a8 tech]

:(I have looked into it but housing prices are way above a spanner monkeys wage

[onzarob]

:(I have looked into it but housing prices are way above a spanner monkeys wage
Yep, we are as expensive as London, but with a fraction of the wage, I bought my house 7 years ago so (For once) I am ok. ;)

[approach]

I have had the update on my 2.0 tdi multi (2006) which has cured the uneven idling but has not fixed the high idle / revs at low speeds. I had it back in to the dealer and they have reset the gearbox to learned mode but the problem persists. They advised to give it 6000 miles to see what happens but i know this will do nothing. Anyone heard of any new fixes or updates?

Love the car but this is getting increasingly annoying.

[Akash]

What type of idling issues are we talking about here?

Just that last two days while its been really cold, my car turns on and shakes a bit and the idling fluctuates a bit
It settles down by the time I get to the end of the road (about 20 feet)

The initial shake is a bit violent. 2007 plate 2.0 TDI multi (or is it tip? - have the steering mounted gears and the S option on the gearbox)

Done 7000 miles on it

[PhilR]

I have had the update on my 2.0 tdi multi (2006) which has cured the uneven idling but has not fixed the high idle / revs at low speeds. I had it back in to the dealer and they have reset the gearbox to learned mode but the problem persists. They advised to give it 6000 miles to see what happens but i know this will do nothing. Anyone heard of any new fixes or updates?

Love the car but this is getting increasingly annoying.

Sounds familiar. My March 07 2.0 TDi multi has been ok since October when it had a software update. Up until that point it over revved all the time every day for a few weeks. Now it does it for about 4-5 miles once every 10-14 days, which is ok but not great. Apparently it's down to the diesel particle filter (DPF) that minimises the emissions. On the smaller engines it doesn't generate enough heat to burn off the particles and therefore needs to do the high revving. My friends 2.7TDi 07 multi has never had this problem.

My biggest issue is the 10500 miles it went to the first service, and the fact that it's only going to do the same again to the next. I wouldn't mind but my 2.0 TDi manual 2005 went 17000 miles. I'm convinced it's to do with this high revving. I'm in 'discussion' with Audi Customer Services at the moment (who have been ignoring emails and not responding to calls - not impressed).

Don't think I'd get another multi. I like to auto but the cost in terms of mpg is too high, and the over revving is a pain.

If I was you I would keep the heat on Audi as it won't resolve itself. Southampton Audi seem to have got mine down to the above manageable levels so it may be worth getting your dealer to speak to them.

[PhilR]

What type of idling issues are we talking about here?

Just that last two days while its been really cold, my car turns on and shakes a bit and the idling fluctuates a bit
It settles down by the time I get to the end of the road (about 20 feet)

The initial shake is a bit violent. 2007 plate 2.0 TDI multi (or is it tip? - have the steering mounted gears and the S option on the gearbox)

Done 7000 miles on it

That's different to my issue. This is the engine suddenly doing 1400 rpm no matter how slowly you're going, then it dropping like a stone to 1000rpm when practically stationary. Normally mine idles at 800 - 850 rpm. When it starts overrevving it's horrible to drive.

[approach]

What type of idling issues are we talking about here?

Just that last two days while its been really cold, my car turns on and shakes a bit and the idling fluctuates a bit
It settles down by the time I get to the end of the road (about 20 feet)

The initial shake is a bit violent. 2007 plate 2.0 TDI multi (or is it tip? - have the steering mounted gears and the S option on the gearbox)

Done 7000 miles on it


I have the same issue at start up which i can accept. The main problem for me is the fluctuating revs (same as Phil R).

2006 2.0 TDI Multi S Line with paddleshift

[approach]

Sounds familiar. My March 07 2.0 TDi multi has been ok since October when it had a software update. Up until that point it over revved all the time every day for a few weeks. Now it does it for about 4-5 miles once every 10-14 days, which is ok but not great. Apparently it's down to the diesel particle filter (DPF) that minimises the emissions. On the smaller engines it doesn't generate enough heat to burn off the particles and therefore needs to do the high revving. My friends 2.7TDi 07 multi has never had this problem.

My biggest issue is the 10500 miles it went to the first service, and the fact that it's only going to do the same again to the next. I wouldn't mind but my 2.0 TDi manual 2005 went 17000 miles. I'm convinced it's to do with this high revving. I'm in 'discussion' with Audi Customer Services at the moment (who have been ignoring emails and not responding to calls - not impressed).

Don't think I'd get another multi. I like to auto but the cost in terms of mpg is too high, and the over revving is a pain.

If I was you I would keep the heat on Audi as it won't resolve itself. Southampton Audi seem to have got mine down to the above manageable levels so it may be worth getting your dealer to speak to them.

I agree. The overe revving on mine is daily but i dont think mine has a DPF. My first service went 18000 miles, second one 13000 which is mainly motorway mileage. I am keeping the heat on the dealer as the reason i bought the car was the long life servicing. My wife has a 2.0 TDI manual convertible A4 and that has only reached 12000 on first service.

[Simert]

My 2006 A6 multitronic 2.0 TDi does it too. Hunting at idle.

Good to know I'm not the only one and hope there's a solution sometime soon.

[Cannis]

I have a 2005 A6 2.0tdi, it idles fine apart from when you are slowing down for a junction for example and are in neutral, it idles very rough untill the exact point when you stop moving then idles perfectly, very weird! any ideas? :D

[a8 tech]

If you can post a vag com log with the engine ecu part number and software version i may be able to help,depending on the sw version there has been a software update available for a while to stabilize the idle and reduce egr flow to prevent this.
Please note this isn't a recall before you ask.lol

[Cannis]

Thanks for your reply, i dont have vag com, i only have the use of a snapon modus scanner at work but i doubt that will tell me anything, any idea how much main dealer charges for software update? will be relieved if its only sommat like that as it feels like its on 3 pots when it does it! :D

[a8 tech]

yes the egr is allowing to much flow so it judders,1 hour for the update.To confirm this disconnect the grey multi plug on the egr valve and see if it stops as your snap on scanner will let you turn the eml off when you reconnect the egr multiplug

[Cannis]

Thanks mate you rule :D

[Cannis]

Just a thought why only when you are moving?

[a8 tech]

Well you have the multichronic which has no torque converter so there can be a delay in the drive but because the egr is from idle to about 1800 rpm its like the engine cant deliver the torque to set off smoothly (best way i can describe it ) or like talking to your wife when you come back from the pub horny lol

[Cannis]

Sorry should have said its a 6 speed manual

[a8 tech]

Check for any fault codes relating to egr,the flap breaks away but because its turned by electric motor that still feeds back to the ecu (open /closed) the eml stays off.Try to disconnect it and and monitor the running with the muliy plug disconnected.There are lots of causes for the 2.0 Pd engine to run erratic but this suggestion is one of the easier ones to eliminate

[Cannis]

Cheers mate, have a good weekend.

[a8 tech]

and you

[Smithy23]

2006 A6 2.0 tdi manual 55k miles

My A6 has had a bit of a rough idle whilst stood still and it car shakes at between 1600 and 1800 rpm when revved in neutral. Performance seems to be OK.

No faults on vag.com

Independent specialist doesn't think its the dual mass flywheel. He said it could be the injectors which would cost me around £450 to sort or it could be a pulley/tensioner.

Thinking of asking the Audi dealers to have a look but for obvious reasons would see this as a last resort.

Any ideas?:confused:

Dealers said it's probably the DMF .. *****

[sam2k01]

That's different to my issue. This is the engine suddenly doing 1400 rpm no matter how slowly you're going, then it dropping like a stone to 1000rpm when practically stationary. Normally mine idles at 800 - 850 rpm. When it starts overrevving it's horrible to drive.

@PhilR did you manage to find out was was wrong in the end, mine is having the exact same issue on 2.0tdi a6 c6 2006.

@cannis did you manage to sort yours out aswell mate?

this is driving me insane, and because its not spitting out any fault codes, the garage just seems to be guess working???? and nothing seems to fix it.

....also the EGR and MAF has been changed.

@a8 tech....could a software update fix this!?!

Many thanks all in advance for any replies.

[08a6]

I do have some sporadic issues with my 2007 2.0 TDi multi. Interesting to hear A8s point of view.

My car does occassionally idle sporadically when cold, especially when it's in neutral. The biggest problem is that it revs high for no apparent reason. I can be almost stopped and the engine is still revving at 1500rpm. Additionally it won't seem to chage up a gear, even when i'm at 2000rpm and try to override the multi by using the paddles. Additionally it won't drop below 1500 rpm until stationery. The idle is always 1000rpm when the car is having this problem. The normal idle is about 850 rpm.

I bought the car in March and the first issue was July. Then it happened regularly, especially through September. Audi have said that it's something to do with the recharge of gases through diesel particle filter and is 'normal'. My dealer has said that they've had several other customers with the same issue. The problem seems to have gone away over the last 3 weeks or so, but this has happened before.

Not sure if this ties in with your problem or not.

This is a superbly acticulate way of explaining the issue I have.

I couldn't have put it better.

[sam2k01]

This is a superbly acticulate way of explaining the issue I have.

I couldn't have put it better.

I am having the exactly same issues down to every detail too. Any help would be much appreciated!!

[PhilR]

This is a superbly acticulate way of explaining the issue I have.

I couldn't have put it better.

It's definitely the diesel particulate filter (DPF). It happened on my 2007 A6 multi a lot, and does so on my 2012 A6 multi too, but not quite as often. Normally it coincides with the engine fan running on after I've switched off the engine.

I think it's what Audi would describe as a 'feature'!

[sam2k01]

Cool, filled up some Wynn's Diesel Particulate Filter Cleaner 325ml on a full tank of Shell today, so will update the thread on the outcome. Many thanks!

[Cwizard]

i wouldnt recommend shell, bp fuel is better quality i believe. at least in oz. shell accounts for cheapest and dirtiest. even the vpower here is average.

[sam2k01]

quick update, DPF Cleaner didnt work for me, so i purchased a VAG and done a forced DPF regen which seems to have completed successfully as it said 0.0% on duty cycle on channel 75. But I am still having the same problems?
I do dialy weekday trips on the motorway so I cant see any reason why my DPF will block.

very annoying. I feel like giving up and selling but 1, I Wont get what I paid if its not driving well and 2, I love the damn car a lil to much. :(

Somebody please HELP!!!! Many Thanks.

[sam2k01]

this is driving me nuts. Got a second opinion on the DPF and garage saying its not the DPF but it could be injectors? His not sounding to confident and I really don't want to pay for an expensive guess. Any other ideas anyone?

[sam2k01]

Decided to bite the bullet and sent in my car in a few days ago to get the DPF removed and car remapped just in case. Still hasnt resolved the problem and I am going insane. I'm leterally throwing money away on this car. Any other options / advice would be GREATLY appreciated... :1zhelp::1zhelp::1zhelp:

[gupsterg]

Still hasnt resolved the problem and I am going insane. I'm leterally throwing money away on this car.

I know how that feels mate :( ....


Any other options / advice would be GREATLY appreciated... :1zhelp::1zhelp::1zhelp:

More and more I'm coming to the conclusion I must sell mine regardless of £££ I've spent or gonna lose :( ...

[ChA6dders]

2006 A6 2.0 tdi manual 55k miles

My A6 has had a bit of a rough idle whilst stood still and it car shakes at between 1600 and 1800 rpm when revved in neutral. Performance seems to be OK.

No faults on vag.com









Independent specialist doesn't think its the dual mass flywheel. He said it could be the injectors which would cost me around £450 to sort or it could be a pulley/tensioner.

Thinking of asking the Audi dealers to have a look but for obvious reasons would see this as a last resort.

Any ideas?:confused:

Dealers said it's probably the DMF .. *****

I have the exact same symptoms slightly rough idle then a judder as if the engine is miss firing slightly at around 1600 rpm. No acceleration issues or changing gear issues ets it's a 2.0TDi manual with 131k wondering if the egr needs cleaning

[ChA6dders]

Decided to bite the bullet and sent in my car in a few days ago to get the DPF removed and car remapped just in case. Still hasnt resolved the problem and I am going insane. I'm leterally throwing money away on this car. Any other options / advice would be GREATLY appreciated... :1zhelp::1zhelp::1zhelp:

IMO A remap would only exasperate the problem cos it's going to put extra strain on the car

[sam2k01]

How u getting along with yours @cha6dders??


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[Bolio]

I would be interested to hear if you have fixed it yet aswell. I have the same issue a slight misfire at 1700rpm sometimes it's hardly noticeable but others its really bad and runs like a real pig, up to now I have changed the throttle control valve and the egr valve which improved the running a bit but the misfire is still there. I do a lot of miles (500-700 a week)so I do have time to see when it's more prominent and it seems to get worse when you have been giving it a bit of stick and keeping the revs up, if I just sit at 60-70 with the cruise on it seems to run fine. What I have noticed as I have been looking under the engine bay is there is a small black wire on the big black plug off the wiring loom that goes into the injectors that isn't connected to anything. I have asked some audi specialists what this is for and nobody knows? Mines a per face lift 2.0tdi sline multitronic 58 reg with 112000 miles.

[sam2k01]

An update on this thread -- I had the Remap reversed on the 14 day money back guarantee as it didn't fix the problem back in august. They were totally understanding and didn't give me any trouble. I went down the egr route which I'm updating on the egr delete thread started by gup.


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