Help with some Fault Codes - Golf GTI

[schmidt_vr6]

After hooking the car onto vagcom. The following 8 errors came up, Any pointers would be appreciated.

012691 - Intake Manifold Runner Control
              P3193 - 002 - Open stop outside of valid range

012423 - Voltage Supply Relay For Engine Management
              P3087 - 001 - Electrical Malfunction

005634 - Power Supply Terminal 30
              P1602 - 002 - Voltage too low - Intermittent

000052 - Turbocharger Bypass Valve Control Circuit
              P0034 - 002 - Low

000581 - Solenoid Valve For Boost Pressure Control (N75)
              P0245 - 002 - Short to ground

000049 - Oxygen (lambda) Sensor B1 S1: Heating Circuit
              P0031 - 002 - Short to ground

000055 - Oxygen (lambda) Sensor B1 S2: Heating Circuit
              P0037 - 002 - Short to ground

004195 - Fuel Pressure Regulation
              P1063 - 002 - Control range not reached - Intermittent

[Scottymon]

Is battery healthy? Have you cleared and rescanned?

Plumb the codes into the Ross Tech website if they return:

1st one: http://wiki.ross-tech.com/wiki/index.php/19649/P3193/012691

How does it drive?

[schmidt_vr6]

Well the car was driving fine, but a couple of times they would be a "dip" in power and then it'll go back to normal. When I mean "Dip", The car would not be responsive for a matter of seconds then it will come back to life.

Anyway parked car up, Next morning tried to start the car and battery is dead. So put on a good second hand battery from my other car and it soon drained that out. Jump started it with the leads and it was fine. Next morning I was dreading it would be dead but to my surprise it started first time.

Then the car lost all turbo power, so had it scanned on Vagcom and the above fault codes came up.

I have cleared the codes, but not had time to re-scan as of yet.

[Scottymon]

Any recent mods that you think could be draining power? Head unit...

It's amazing how many errors pop up when the system is low on juice... I'm not suggesting it's your only problem but worth sorting first IMO.  Have a garage check over the charging system and battery/s.

[schmidt_vr6]

No Mods. Car is standard. Head unit is standard too.

First port of call is to check to see if the faults have re-appeared.

The one thing I cant seem to get my head round is that all the codes have; "Intermittent", "Low" & "Short To Ground" next to them.