Motorised sound in engine bay

[stealthwolf]

Went to top up the screenwash today. Car was in garage (has been all day). Opened the car, keys in the ignition, move to step 2 (power on), autolights were switched on. Opened bonnet.

As I filled the screenwash reservoir with VW screenwash, I could hear some whining motorised noise every few seconds. Coming from left hand region of engine bay.

What was it?

[RedRobin]

....

Could it be related to the fact that you were doing things with the screenwash while the engine was running. I always do any maintenance, even fluid top-ups, with the engine off and the ignition key out.

Or it could be the car going through programmed startup routines which you don't normally hear when in the driver's seat.

[neg]

High pitched squeel - goes on for about a min then stops.  Throttle body reset I think, 1.8T used to do the same.

[WhiteGTI]

As bacillus wrote on your other topic on mk5golfgti, it is most likely to be the throttle body callibration!

Its normal, I hear it also on mine, and most modern cars!

[stealthwolf]

Ignition was off but power was on.

Cool. Thought it was something dodgy.

[RedRobin]

....

I've now got high-pitched whining in my head and am posting everything twice - I must have entered a parallel world!