Dodge P1499 EGR Stepper Motor Malfunction – Circuit 4 (1.8L). Description OBD-II Trouble Code Description for P1499 Dodge EGR Stepper Motor Malfunction – Circuit 4 (1.8L). Kia OBD-II Trouble Code Description for P1499 Dodge EGR Stepper Motor Malfunction – Circuit 4 (1.8L) OBD-II Trouble Code Description for P1499 Dodge EGR Stepper Motor Malfunction – Circuit 4 (1.8L).