It could mean a few things, but the most common things to look for are a loose gas cap and oxygen sensors. Most likely with that kind of miles it's probably your oxygen sensors
The engine size of the Honda Civic is 1.8 litres.
The 2009 Honda Civic has an inline 4 engine.
The 2007 Honda Civic has an inline 4 engine.
The 2001 Honda Civic has an inline 4 engine.
The 2004 Honda Civic has an inline 4 engine.
The 2005 Honda Civic has an inline 4 engine.
The 2014 Honda Civic has an inline 4 engine.
The 2006 Honda Civic has an inline 4 engine.
The 2011 Honda Civic has an inline 4 engine.
The 2010 Honda Civic has an inline 4 engine.
The 2008 Honda Civic has an inline 4 engine.
The 2002 Honda Civic has an inline 4 engine.