Sphyiox

Hi I was wondering if I could get some help with this error code I'm getting on my Cayman S 3.4L 2007 manual transmission. It says EGR Boost Sensor Solenoid Valve Open or Short.....what does that mean? Do I need to change the EGR valve? the wiring or what? Can I get some real information on the topic, how to fix it or what do I need to do about it. Has google search it already a few times and I'm always getting superficial pointless information. Has anyone gone thru this already and fix it? What does it take to do so?