DTC P0403: EGR Control Circuit: Operation

The EGR solenoid power is supplied from the MFI relay (terminal No. 4). The ECM (M/T) or PCM (A/T) controls the EGR solenoid ground by turning the power transistor in the ECM (M/T) or PCM (A/T) on and off.

See Figure , Figure , Figure , Figure and Figure .