What does service vehicle soon mean

It means prepare to open your wallet - even if the vehicle is not necessarily in need if repair or scheduled service. In the case of most air cooled Porsche instances of "check engine light" coming on, the fix is to take a brisk drive between 4 and 6000 RPMs for maybe 10 miles / case solved. The gummed up air-fuel mixture portals are blown free of debris and the light goes out shortly after cool down. In your case, try it. What is the risk. The other option is to disconnect the (+) battery terminal, wait ten minutes, reconnect and see if the light pops back on. And always check to see if your gas cap is properly retightened after a fill-up. That is the most common trigger in most vehicles as it is a warning that you are polluting the air with a wisp of gasoline fumes, a really really bad thing to do in this over regulated State of confusion.