Iowa Chapter Director
Join Date: Jul 2002
Location: Ames, Iowa
there are several codes that is could throw that pertain to the EGR, and they all give different specific information that would help you in finding the problem and fixing it. If you paid them to do it and didnt give you any further information Id get my money back if I were you.
EGR stands for Exhaust Gas Recirculation. It's a valve that connects a line from the passenger side exhaust downtube up to the back of the upper intake manifold. If you look at your engine, you'll see a little round disc UFO looking things right behind the throttle body, thats the valve, the sensor is about 1" away from it, it's gray and cube shaped, clipped onto a metal bracket. The code could have read, EGR circuit above maximum voltage, below minimum voltage, insufficient airflow, valve constantly open, etc. There are very many things that could be wrong with it.
1988 Notch Mustang: - 438W, direct port n2o, t56
2003 SVT Focus: - SCT X3 tuner