Could be anything. normally its the oil level is low or the sensor is broken. it could also be your oxygen sensors are broken and need replacing.
The 2013 Volkswagen Golf has an inline 5 engine.
The 2005 Volkswagen Golf has an inline 4 engine.
The 2011 Volkswagen Golf has an inline 5 engine.
The 2014 Volkswagen Golf has an inline 5 engine.
The 2012 Volkswagen Golf has an inline 5 engine.
The 2013 Volkswagen Golf-R has an inline 4 engine.
The 2014 Volkswagen Golf has a 2.5 L base engine size.
The 2001 Volkswagen Golf has a 2.0 L base engine size.
The 2011 Volkswagen Golf has a 2.5 L base engine size.
The 2003 Volkswagen Golf has a 2.0 L base engine size.
The 2012 Volkswagen Golf has a 2.5 L base engine size.
The 2013 Volkswagen Golf has a 2.5 L base engine size.