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MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE> 13B-621 STEP 20. Test the OBD-II drive cycle. Diagnostic Function − OBD-II Drive Cycle − Procedure 6 − Other Monitor (2) Check the diagnostic trouble code (DTC). YES : Retry the troubleshooting. DTC P0401: Exhaust Gas Recirculation Flow Insufficient Detected . TECHNICAL DESCRIPTION • When the EGR valve (stepper motor) is actuated from the fully closed position toward the open • The PCM checks how the EGR gas flow signal changes. . DESCRIPTIONS OF MONITOR METHODS recirculation (EGR) operation from closed to . MONITOR EXECUTION . MONITOR EXECUTION CONDITIONS (Other Other Monitor (There is no temporary DTC stored in memory for the item monitored below) • EGR stepper motor monitor Sensor (The sensor below is determined to be normal) • Mass airflow sensor • Engine coolant temperature sensor • Intake air temperature sensor • Barometric pressure sensor • Throttle position sensor • Manifold absolute pressure sensor • Accelerator pedal position sensor . |