Replacing the battery was not likely the cause of your check engine light. Most auto parts stores have a code reader will read the code for you at no charge and reset the light.
The 2006 Subaru Forester has a flat 4 engine.
The 2001 Subaru Forester has a flat 4 engine.
The 2005 Subaru Forester has a flat 4 engine.
The 2002 Subaru Forester has a flat 4 engine.
The 2008 Subaru Forester has a flat 4 engine.
The 2003 Subaru Forester has a flat 4 engine.
The 2014 Subaru Forester has a flat 4 engine.
The 2010 Subaru Forester has a flat 4 engine.
The 2011 Subaru Forester has a flat 4 engine.
The 2009 Subaru Forester has a flat 4 engine.
The 2004 Subaru Forester has a flat 4 engine.
The 2012 Subaru Forester has a flat 4 engine.