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 Post subject: 2006 Audi A4 problem
PostPosted: Wed Nov 16, 2016 7:45 pm 
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Driving home from work today and lost a bit of power overtaking. Feels like turbo has packed in, but I also noticed cruise control is also no longer working either.

Any connection?

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 Post subject: Re: 2006 Audi A4 problem
PostPosted: Wed Nov 16, 2016 9:27 pm 
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Found this if it helps re cruise control
http://www.audiworld.com/forums/a4-b5-p ... ng-168736/


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 Post subject: Re: 2006 Audi A4 problem
PostPosted: Wed Nov 16, 2016 9:30 pm 
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boxedin wrote:
Found this if it helps re cruise control
http://www.audiworld.com/forums/a4-b5-p ... ng-168736/

Cheers mate. Just been in touch with a mechanic I know, and he reckons it's gone into limp mode.

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 Post subject: Re: 2006 Audi A4 problem
PostPosted: Wed Nov 16, 2016 9:31 pm 
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EGR valve is probably the first thing to check - although my Passat would sometimes go into "limp mode" but return to normal after it was switched off and then on again.

When it did start playing up (only did it about three times in several years) it was just as I was giving it some welly.

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 Post subject: Re: 2006 Audi A4 problem
PostPosted: Wed Nov 16, 2016 9:36 pm 
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ayjay wrote:
EGR valve is probably the first thing to check - although my Passat would sometimes go into "limp mode" but return to normal after it was switched off and then on again.

When it did start playing up (only did it about three times in several years) it was just as I was giving it some welly.

It's a weird one. No warning lights on dash. Hopefully it'll be nothing major.

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 Post subject: Re: 2006 Audi A4 problem
PostPosted: Thu Nov 17, 2016 11:51 am 
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year ? petrol or diesel ? manual or auto ?

The A4 is a golf in a audi suit, not all faults put the Money light on, but it may of logged a code as historic, get the car scanned for codes - is the first thing I would do, most systems can actuated (bi-directional comms) with a decent scan tool


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 Post subject: Re: 2006 Audi A4 problem
PostPosted: Thu Nov 17, 2016 12:35 pm 
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fitzy wrote:
ayjay wrote:
EGR valve is probably the first thing to check - although my Passat would sometimes go into "limp mode" but return to normal after it was switched off and then on again.

When it did start playing up (only did it about three times in several years) it was just as I was giving it some welly.

It's a weird one. No warning lights on dash. Hopefully it'll be nothing major.

Sent from my SM-G850F using Tapatalk


I never got any warning lights with mine - the first time it happened I went another 20 miles in limp mode (barely made it up a couple of hills) turned the engine off at my destination not sure if it would start again, when I did start it again it was cured. The next couple of times it happened I just stopped asap and fired it up again and it was cured again - never really knew what it was, but the EGR valve or MAF sensor was suggested as the most likely problem.

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 Post subject: Re: 2006 Audi A4 problem
PostPosted: Thu Nov 17, 2016 12:38 pm 
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flash22 wrote:
year ? petrol or diesel ? manual or auto ?

The A4 is a golf in a audi suit, not all faults put the Money light on, but it may of logged a code as historic, get the car scanned for codes - is the first thing I would do, most systems can actuated (bi-directional comms) with a decent scan tool

Diesel 2litre manual.


Working fine this morning, but it's due a service soon so will get him to put in on his machine and hopefully get to the bottom of it.

Cheers guys.

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 Post subject: Re: 2006 Audi A4 problem
PostPosted: Thu Nov 17, 2016 1:35 pm 
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Often with diesels if it does a lot of short journeys the dpf can get clogged up, same for the turbo really, I had mine go into limp mode and a temporary solution was to run it in 3rd and 4th gear for a while. I now use and have done for about 3 years used Archoil products to keep everything running tip top, keeps the turbo, injectors, dpf and fuel system clean as well as being able to bring things back to life before going down the expensive route of replacement.

Here's a couple of articles regarding turbos and egr's

http://www.oilem.com/importance-of-a-clean-egr/

http://www.oilem.com/turbo-cleaning-and-turbo-cleaners/



For this message the author surrealdeal has received gratitude : fitzy
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