Just wondering as it would appear I have to replace it?

Get this on VCDS

Address 08: Auto HVAC Labels: 6Q0-820-045.lbl

Part No: 6Y0 820 045

Component: Klimaanlage X0760

VCID: F2EED6DBBECEF288A6F

1 Fault Found:

00818 - Sensor for Evaporator Outlet Temperature (G263)

30-10 - Open or Short to Plus - Intermittent

This is a shot of the left side of the engine bay, just below the coolant bottle. LOADS of room this side of the engine bay!

Little bit worried now as I think I have found out its tucked away behind the dashboard! What does the G263 do?

And while we're at it, I assume this lambda sensor isn't expensive / tricky to swap?

17604 - Oxygen (Lambda) Sensor Heater Circuit: B1 S1

P1196 - 35-10 - Electrical Malfunction - Intermittent

I think that's the other one, the condenser sensor.

I think G263 is the one in the depths of the dash: http://www.briskoda.net/forums/topic/61180-fabia-evap-temp-sensor-how-to-with-pics/

I'm sure I read somewhere that its function is to help maintain a minimum >0 temp to prevent the evaporator freezing into a solid block of ice.

For the oxygen sensor, with a description of intermittent problem, I would be checking wiring connector as a first step.