Originally Posted by rwenzing
It could be a few different things but the odds are 99%+ that it is a bad Differential Pressure Feedback EGR (DPFE) sensor that measures the EGR flow rate. Approximate price for the part is $40~$100 and it is not difficult to change.
It is extremely uinlikely that the EGR valve itself is causing this code.
just unscrew the old one.... pull the hoses off..out the hoses on the new one, screw back on... done... ill get a pic of it in a second