First of all, sorry for my English, I am Slovakian - I´ll try to be clear as much as I can.
Well... Two hours ago I was to book an appointment in near garage for Air Con re-charge + tracking.
After I left the garage - Engine Management light have come up. So I returned for check with their computer.
They plugged in - and result was supposedly... Nothing! They said it should be just system error. They disabled EM light and after one drive it came up again . Oh and:
While I was returning to them (before checking) I am pretty sure that I have heard different engine sound at every each shifting (between shifts when rpm going down).
- sound was a little bit louder and heavier. And it continued until I returned home.
Yes... It have been so hot weather last days. I touched the water tank - and it was soo hot too. But at dashboard it was normal - temperature around the middle...
I will go check oil level after couple minutes. As I have no clue what this all means...

Does anyone have an idea or experience with this?

BIG THANKS for every answer.

´07 ST 2.0

Does it feel like it's losing power top end?

I think the garage might be reading their system wrong, an EML will be caused by a code.

First thing to check, did they for some reason unplug the MAP sensor on the top of the engine (right hand side?)

Thank You. Please, what is EML?
And I didn´t notice unplugging anything ... You mean under hood?
And no... It doesn´t loosing power at all... Just a weird sound between shifting when RPM coming down.

Thanks for suggestions. Finally I´ve been in garage today.
And They´ve found a problem - supposedly it was some wiring problem - high resistance.
So They re-wired it and light have shut down. And the sound is OK again.
Hopefully it will last now as it is...

Engine Management light.