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P0400 Diagnostic Trouble Code Discussion for August 2004

Exhaust Gas Recirculation System Flow Malfunction

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Trouble Ticket Help Requests for DTC P0400
Help Request Posted
1998 Chevrolet Tracker 1.6L MIL Lamp on VIN: 2CNBJ136XW
P0400: egr flow. Need some help if someone has seen this before i have had this and another with the same problem .all the egr selonoid pres transducer and valve are working i can make the egr work on the lift .the map voltage changes when the egr is applied . i can apply 3 in...
August 10, 2004
1997 Kia Sportage 2.0L Poor Idle Quality, Surge, Misfire, MIL Lamp on VIN: KNDJB7236V
P0400: Insufficient EGR System Flow Detected. Number 4 spark plug had a carbon track, replaed plugs, coils and wires with Kia parts. That fixed PO304 code. Egr valve would not hold vacuum, replaced it with a Kia part. Then I had a rough idle, EGR driver in PCM is not pulling control circuit down so EGR v...
August 19, 2004
2000 Nissan Maxima GLE 3.0L MIL Lamp on VIN: JN1CA31D8Y
P0400: EGR System Recirculation Flow. Replaced egr valve passage looked clear but code came back after driving.
August 24, 2004