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