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Old 06-30-2010, 09:34 AM   #1
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Default Audi A6 - fault codes help

Hi,

Hope ive posted this in the rigth place but basically im looking for some advice with some faults my Audi appears to have..

Firstly, when i bought the car (a few months ago) the engine management light was on but i was assured there was nothing wrong and it was a 'gremlin' of sorts. Since then ive driven regularly for 2 or 3 months with no problems other than i have had to top the oil up on 3 occasions (each time putting 1litre in).

Yesterday whilst doing about 65 on the motorway, the EPC, ESP and ABS warning lights came on the dash and it went into what i believe is refered to as 'limp mode'. I couldnt increase my speed and acceleration was non existent. Flipping into semi auto mode and manually going up and down gears had no effect on performance (the engine did rev however - reluctantly). Anyway, i drove home carefully and then today borrowed a friends KII USB cable and ran the diagnostics which came back with a few faults.

I wonder if anyone could help shine some light on to what is the problem(s)?

here is the readout:

Chassis Type: 4B - Audi A6 C5
Scan: 01,02,03,06,08,15,16,17,18,34,35,36,37,45,55,56,57 ,65,67,75,76,77

-------------------------------------------------------------------------------
Address 01: Engine Labels: Redir Fail!
Controller: 4B0 906 018 AD
Component: 1.8L R4/5VT 0002
Coding: 11582
Shop #: WSC 02325
WAUZZZ4BZ1N099004 AUZ7Z0Y1662201
5 Faults Found:
16795 - Secondary Air Injection System: Incorrect Flow Detected
P0411 - 35-00 - -
17544 - Shareware Version. To Decode all DTCs
P1136 - 35-10 - Please Register/Activate - Intermittent
17887 - Shareware Version. To Decode all DTCs
P1479 - 35-00 - Please Register/Activate
18047 - Accelerator Position Sensor 1/2 (G79/G185): Implausible Signal
P1639 - 35-10 - - - Intermittent
18047 - Shareware Version. To Decode all DTCs
P1639 - 35-10 - Please Register/Activate - Intermittent
Readiness: 0000 0000

-------------------------------------------------------------------------------
Address 03: ABS Brakes Labels: 8D0-907-389.LBL
Controller: 8D0 907 389 D
Component: ABS/ESP front D56
Coding: 06279
Shop #: WSC 02325
1 Fault Found:
18264 - Throttle Potentiometer (G69): Error Message from ECU
P1856 - 35-10 - - - Intermittent



For the first problem ive found this:

http://wiki.ross-tech.com/wiki/index...5/P0411/001041

which gives me an idea what to look for and similarly this one:

http://wiki.ross-tech.com/wiki/index...4/P1136/004406

for the third:

http://wiki.ross-tech.com/wiki/index...7/P1479/005241

the fourth and fifth i havnt been able to find anything (yet):

18047 - Accelerator Position Sensor 1/2 (G79/G185): Implausible Signal

and the brake fault:

18264 - Throttle Potentiometer (G69): Error Message from ECU
P1856 - 35-10 - - - Intermittent


Is there anything here obvious to someone as to what the problem might be? are they related in anyway?

Thanks,
Pabzilla
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Old 07-01-2010, 06:55 PM   #2
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Just a quick update:

i started the car today and no lights were on the dash (except the engine management light - which is always since i had it).


i test drove it ok for a few miles - everything seems ok. I then drove it 25miles to work - no problems, although if anything there is a 'whistling' noise around 2k rpm but that could just be a noisey turbo i suppose - although it may be linked to the whole 'incorrect air flow' problem..

I did think that on the motorway at 70mph the car would go into limp mode again but it didnt..

more confused than ever now..!

any help?
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Old 07-13-2010, 11:23 AM   #3
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I like Audi, because I loved more than seven years. But he had to travel through the shop was four digits. I thought it would be fun to do another type of car we have an SUV and Jaguar XJ-6, so I was very large sedans.
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Old 07-19-2010, 12:13 AM   #4
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Quote:
Originally Posted by pabzilla View Post
Just a quick update:

i started the car today and no lights were on the dash (except the engine management light - which is always since i had it).


i test drove it ok for a few miles - everything seems ok. I then drove it 25miles to work - no problems, although if anything there is a 'whistling' noise around 2k rpm but that could just be a noisey turbo i suppose - although it may be linked to the whole 'incorrect air flow' problem..

I did think that on the motorway at 70mph the car would go into limp mode again but it didnt..

more confused than ever now..!

any help?
Ok, firstly, thanks for NO help guys.. really great forum here...

it turned out to be a one way valve which had perished, ive replaced and reset the ecu now so far so good..
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Old 04-06-2011, 06:23 AM   #5
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Hello, I have a couple of the same faults that just showed up, but have cleared on their own. You mentioned that you replace a faulty one way valve. Can you provide more details and the part no.? Thanks!

Address 01: Engine
18047 - Accelerator Position Sensor 1/2 (G79/G185): Implausible Signal
----------------------------------------------------------------------
Address 03: ABS Brakes
18264 - Throttle Potentiometer (G69): Error Message from ECU
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Old 04-06-2011, 06:23 AM
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18047, 2002, a6, allroad, audi, c4, code, codes, dtc, error, fault, p0411, p1639, trouble, urs6


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