What is EGR flow circuit malfunction?
What is EGR flow circuit malfunction? P0403 is an OBD-II generic code that indicates that the engine control module (ECM) has detected the engine exhaust gas recirculation (EGR) circuit has malfunctioned. The ECM detected a short or open circuit in the EGR vacuum control solenoid or wiring to the solenoid. What does p0489 EGR control circuit " a " mean? Your engine computer fails to see any voltage change as it attempts to open or close the EGR indicating it is stuck in one position. Codes P0489 EGR control circuit "A" means no low voltage change to indicate the EGR...