Suppose that there is an error on the car's diagnose. I do not fix it, but just erase it. From what variables is the error depended on to reappear? Is it mileage or is it time?
To be more explanatory, is it a matter of how many km the car makes after the error deletion OR is it a matter of days to reappear even though i do not move the car?

 

Depends on the error. Some are immediate. Some are drive cycles. Some are other criteria.

What error are you talking about?

 

Errors that indicate a faulty Solenoid valve (SOLV).

 

I had Vanos errors, I'd clear them and sometimes they'd come back next day and other times it took a week. Replacing them of course cured the issue.

 

Just like most of said on the other board....
It depends....
You have lots of good info...
But one note...
Clearing an error does not fix anything...it's just the computer telling you there is a problem...clearing the error is you just like a kid throwing away a note from his teacher.....and the teacher will write another note...ignore it, nothing gets fixed.
A solenoid can be "sticky"....it generally means it's failing....
You have a warning sigh....you can try to fix it...sometimes cleaning it and it the connectors....or replace it...or ignore it, and chance getting stuck.
Clearing a code and seeing if it comes back CAN sometimes be a good troubleshooting technique ....a one time code can be a odd event...but if it comes back...there is usually a problem.

 

Minnie.the.Moocher and ZippyNH what exactly issues did you have when your VANOS failed?

 

Rough idle and loss of full power.

 

Can you describe more efficiently the "loss of full power"? Perhaps with an example?

 

Without trying to be sly, you press the accelerator and you feel the engine hesitate and not go as fast for the given pedal input.