aircon problem

[pugboy607]

Hi I am new to the forum so hope I can get some help with my 2003 a8 air con problem........Aircon did not work when I bought the car, had it regassed, no difference..so took to local garage who are pretty good, he put on Vag-Com for free(result)........it showed the following faults............
00819 high pressure sensor...open circuit
00727 potentiometer in defrost flap motor
00728 left centre vent motor [COLOR=blue !important][COLOR=blue !important]position [COLOR=blue !important]sensor[/COLOR][/COLOR][/COLOR]
00735 recirculation flap motor position sensor
01851 position sensor defrost/upper body shut off flap motor
08169 left rear cold/warm air outlet motor position sensor
01592 sensor air quality
Now the garage checked and found that the condenser had a bad [COLOR=blue !important][COLOR=blue !important]leak[/COLOR][/COLOR], so this is being replaced, as is the high pressure switch, before I start scratching my head and possibly ripping the interior apart for nothing, can anybody tell me is it possible all [COLOR=blue !important][COLOR=blue !important]the [COLOR=blue !important]motor[/COLOR][/COLOR][/COLOR]/sensor faults have one cause or do I really have so many faulty....if the latter is the answer where are they located and how do I access them. thank Ken

[Guest 2]

Welcome to VWAF

Did he clear the faults, and the rescan?

Could you get the full log off him which will show time and dates when the faults occured?

[pugboy607]

Hi Chris
Yes the mechanic did clear faults and all was well until I switched the heater/aircon controls on, then all faults reappeared on the rescan, I may try to get a full print out, however the garage boss has now returned from holiday and he is not so generous as the mechanic(if you know what I mean).But if this will help you to help me then I will bite the bullet and book the car in. Thanks Ken

By the way does my first question show weird additions saying "blue, important, etc" in the middle of some sentences or is it my computer ??????

[gupsterg]

Hi Pugboy607,

Welcome to VWAF! ...

VAG Error Code: 00727 Fault Location: Defroster Flap Motor - Position Sensor (G135)

VAG Error Code: 00728 Fault Location: Left Center Vent Motor - Position Sensor (G136)

VAG Error Code: 00735 Fault Location: Recirculation Flap Position Sensor (G143).

VAG Error Code: 01851 Fault Location: Signal valve actuator motor and defroster vent front right (G317)

VAG Error Code: 01592 Fault Location: air pollution Sensor (G238)

Some of those are on here Link:- http://dtcsearch.planetvag.com/

Did try a quick search to find something on 08169 but no hits in program/web ...

In Chris's signature is a location map of VCDS users, which are forum members. If you get a scan done by one close to you for a beer token it will probably have better info in it.

[pugboy607]

Hi Gupsterg
Thanks for that, looking at the info it would seem that most, if not all of the problems are with motors and/or sensors attached to them. I took cabin air filter off to check its condition, found someone had marked the position of the flaps (I suspect to see if they move) I checked they dont !, I want to check at least one of the motor/sensors. So question, where are they located and more importantly how do I get at them ?
Thanks Ken

[Keithuk]

VAG Error Code: 00819

Fault Location:
High Pressure Sensor (G65) - Open Circuit or Short Circuit to Earth

Possible Cause:
Wiring/Connector(s) from/to High Pressure Sensor (G65) faulty.
High Pressure Sensor (G65) faulty.

Possible Solutions:
Check Wiring/Connector(s) from/to High Pressure Sensor (G65).
Check High Pressure Sensor (G65).


VAG Error Code: 00727

Fault Location:
Defroster Flap Motor - Position Sensor (G135)

Possible Cause:
-

VAG Error Code: 00728

Fault Location:
Left Center Vent Motor - Position Sensor (G136)

Possible Cause:
-


VAG Error Code: 00735

Fault Location:
Recirculation Flap Position Sensor (G143). If this code is found on late model VR6 (AAA) Refer to Code #01247.

Possible Cause:
-


VAG Error Code: 01247

Fault Location:
Evaporative Emission (EVAP) Canister purge Valve (N80)

Possible Cause:
Wiring/Connector(s).
Fuse.
Evaporative emission (EVAP) canister purge valve (N80).


VAG Error Code: 01247

Fault Location:
Position Sensor Defrost/Upper Body Shut-Off Motor: Right Front (G317)


VAQ Error Code: 01592

Fault Location:
Air Quality Sensor (G238) - Open Circuit or Short Circuit to Positive.

Possible Cause:
Wiring/Connector(s).

Possible Solutions:
Air Quality Sensor (G238) faulty.


As taken from my EOBD II Error Codes

[pugboy607]

Hi keithUK
Thanks for your reply, at the moment work is on hold for a couple of weeks as I am waiting arrival of new condenser, as well as new high pressure switch and air quality sensor, the latter two at such silly money I could not refuse them. I intend to fit all three, have the system regassed and then see what faults are still present (if any).........knowing Audi there will be !!! Watch this space
Regards Ken