EGR VALVE PINTLE STUCK OPEN
PCM monitors EGR valve pintle position input to ensure that
valve responds properly to commands from the PCM. When ignition is
turned on, PCM learns the EGR closed valve pintle position. PCM
compares the learned EGR closed valve pintle position to the actual
position when EGR valve is commanded closed. If actual EGR position
indicates that EGR valve is still open when PCM is commanding EGR
closed, DTC will set.
You likely won't notice any drivability problems.