I don't know if this can be reasonably explained but I got a CEL 3 times in 2 months and it was always after the following driving pattern:

Constantly driving under low RPM and then suddenly accelerating to very high RPM (9500). Usually I drive in this fashion but when it gets very intensive and for a long time, I may get the CEL.

Is it a coinsidence again or it can be justified?

 

Blinking Cel that eventually goes away or constant cel?

 

constant that never goes away

 

what is the cel? go pull the code.

 

Yes, get the code, if it was blinking then it is a misfire.

 

Now the CEL is suddenly off. That happened the other times as well. It goes away after 3-4 days. Can I still find the code if I take it to the garage or it must be on at the time they connect it to their device?

 

Yah, the code should still be stored.

For a momentary fault that didn't run any immediate danger of damaging components, you usually get a solid CEL. The fault condition may go away but the CEL will take a few engine start/stop cycles to turn off. However, the code should still be present in the computer.

 

This is exactly what happens. It stays on for about a week, then it turns off for about 2 days and then on again. At the garage they told me it is shown as unspecified/generic error