Hi,

I wanted to share a story that could or might help future Audi S4 owners out there.

My AC failed recently in april 2016 and I scanned my car and there was the G395 code that appeared.
I changed the High pressure switch and fast forward to this month, august 2016, it failed yet again.

One new symptom that wasn't there the first time was my ADS lite switch stopped functionning.
I scanned the car again, and the central instrument module had an error code stating 03020 - Local databus 2 012 - Electrical Fault.
On the same module, the error code with G395 also appeared.

I started by checking my ADS fuse and it wasn't blown. Therefore, my next hypothesis was that the G395 was related to the ADS switch since it appeared in the same vag com module.

So by changing to a new revision High pressure switch 4h0959126B that I bought @ audi dealership, everything was fixed!

Happy audi S4 owner here!