July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

Detection Condition

P0403 indicates an open, short to power or short to ground has occurred in one of four EGR motor coils, circuit or PCM.
P1409 indicates Self-Test has detected an electrical malfunction in EGRVR circuit.

EGR Vacuum Regulator (EGRVR) solenoid receives a variable duty cycle signal from PCM. The higher the duty cycle, the more vacuum the solenoid diverts to the EGR valve.