DTC    P0400    Exhaust Gas Recirculation Flow

DESCRIPTION

MONITOR DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0400)

CHECK FREEZE FRAME DATA (TARGET EGR POSITION AND ACTUAL EGR VALVE POS.)

CHECK FOR EXHAUST GAS LEAKS

REPAIR EXHAUST GAS LEAKAGE POINT

CHECK AIR INDUCTION SYSTEM (AIR LEAKS AND BLOCKAGES)

REPAIR OR REPLACE AIR INDUCTION SYSTEM

INSPECT ELECTRIC EGR CONTROL VALVE ASSEMBLY (FULL CLOSE)

REPLACE ELECTRIC EGR CONTROL VALVE ASSEMBLY

PERFORM ACTIVE TEST USING INTELLIGENT TESTER (CONTROL THE EGR STEP POSITION)

CHECK HARNESS AND CONNECTOR (ELECTRIC EGR VALVE ASSEMBLY - ECM)

REPLACE ELECTRIC EGR CONTROL VALVE ASSEMBLY

REPAIR OR REPLACE HARNESS OR CONNECTOR

CHECK FOR DEPOSIT (EGR PASSAGE)

REPLACE ELECTRIC EGR CONTROL VALVE ASSEMBLY

REMOVE DEPOSIT (CLEAN EGR PASSAGE)

CHECK FOR CAUSE OF FAILURE

CHECK WHETHER DTC OUTPUT RECURS (DTC P0400)

REPLACE ELECTRIC EGR CONTROL VALVE ASSEMBLY

CHECK WHETHER DTC OUTPUT RECURS (DTC P0400)

REPLACE ECM

CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED