P1408 P1408 OBD Code Definition: P1408 EGR Flow out of Self-Test Range P1408 OBD Code Description: OBD Code P1408 EGR Flow out of Self-Test Range OBD Code P1408 Intake Manifold Pressure Sensor Circuit OBD Code P1408 EGR Flow out of selt test range / EDC15C2-Additional heating circuit OBD Code P1408 EGR Temp.Sensor Signal too High