Aircon fault - high pressure sensor - where is it?

[drcarrera]

Hi

My aircon's just stopped working and the Econ light is permanently lit.

VCDS came up with the following code :
High Pressure Sensor (G65)
07-10 Signal too low - Intermittent

So I guess it's either a faulty sensor or a loose connection. However, I can't find its location.
Is it something I can check / replace myself fairly easily or is it going to involve stripping off the front of the car to access?! Any advice gratefully received ...

[R1RS4]

Hi mate,

Found this, gives all the info you need

Hey... hope someone can help. Have done a quick search and cant seem to find a similar issue so hope im not repeating here.

Collected my RS4(B7) 2 weeks ago and already have an issue
The aircon suddenly stopped working, with the ECON button always illuminated. This was intermittent at first but never recovers now.
I invested in the Ross-tech lead and software and have found the following fault:
00819 - High Pressure Sensor (G65)
29-10 - Short to Ground - Intermittent

Does anyone know where the sensor is located? I would prefer to check the connection myself and even replace myself rather than go to an Audi dealer.

Thanks in Advance
Targa27
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Re: Aircon intermittent
Postby Timster » Mon Aug 22, 2011 3:21 pm
Can't answer your questions I'm afraid.... but did you buy your car from an Audi Stealer ?
You have 30 days money-back to wave at them... if you did.

Good luck with sorting it.
VW Toe-rag V6 R-line.... no curry hooks...wtf ?
Gone: Avus Avant B7 RS4.... plus curry hooks !
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Timster
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Re: Aircon intermittent
Postby Targa27 » Mon Aug 22, 2011 4:43 pm
Sorted it... wasnt as bad a job as I had expected.
Firstly I have a 3mth warrenty but I am a long way from the seller and cant do without the car at the moment.

I was able to buy a high pressure sensor from my local Audi garage for £52, came home, removed the front bumper and fitted the new sensor (which is located under the passanger headlight, screwed into a pipe on the end of the aircon rad)
The sensor is a dry-break type of fitting so no loss of pressure.

For those with Vag-com, the sensor was failing off high, (100% High pressure signal and 33bar refrigerant circuit pressure)
The new readings are 28.5 % High-Pressure Signal (G65), 8.0 bar Refrigerant Circuit Pressure

Hope this helps anyone else with a similar fail code in the future.
Now back to enjoying my new toy!!

[drcarrera]

Thanks R1.

Now to find out how to remove the bumper ...!

[R1RS4]

If you go to the RS4 B7 forums and type in the search front bumper removal, just have a look through and one guy did all the photos to go with it, make sure when refitting you align it correctly ie top gap,

If you take a photo before hand you can see if you have refitted the same or made improvements

[drcarrera]

Hmmm... Can't find anything on these forums. A couple of guides elsewhere, although B7, not RS4 specific but hopefully will be similar.

[MB2]

If you search "clear corner mod" either here or Google (add a4 or rs4 for Google) and there are several good guides.

[R1RS4]

If you cannot find mate,

I will have look tomorrow, I am sure I saved it